Here's an episode credit list.  All those who are now dead are marked (dead) - will add to this if and when I do some more research or someone tells me who is dead...

The Way Back

Writer: Terry Nation (dead 9/3/97)

Director: Michael E. Briant

Bran Foster: Robert Beatty (dead 3/3/92)

Ven Glynd: Robert James

Dev Tarrant: Jeremy Wilkin

Tel Varon: Michael Halsey

Maja: Pippa Steel (dead 29/5/92)

Ravella: Gillian Bailey

Dal Richie: Alan Butler

Arbiter: Margaret John

Doctor Havant: Peter Williams

Alta Morag: Susan Field

Clerk of Court: Rodney Figaro

Computer Operator: Nigel Lambert

Guard: Garry McDermott

Walk-ons:

Les Shannon, Derek Southern, John Hensen, Sandy Sinclair, Barry Summerford,

Mort Jackson, Beryl Nisbett

Space Fall

Writer: Terry Nation (dead 9/3/97)

Director: Pennant Roberts

Leylan: Glyn Owen

Raiker: Leslie Schofield

Artix: Norman Tipton

Teague: David Hayward

Krell: Brett Forrest

Nova: Tom Kelly

Dainer: Michael MacKenzie

Garton: Bill Weston

Walk-ons:

Roy Pearce Mark Collins Harry Fielder Stuart Myers Terry Sartain Reg Turner

Mike Mungavin Eric Kent Barry Hayes Michael Reynal Reg Thomason Kenny

Whymark Mark Holmes Peter Roy Alan Crisp Derek Holt Juliette James Robert

Watson David Bache

Cygnus Alpha

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Vargas: Brian Blessed

Kara: Pamela Salem

Arco: Peter Childs (dead 1/11/89)

Selman: David Ryall

Laran: Robert Russell

Leylan: Glyn Owen

Artix: Norman Tipton

Walk-ons:

Malcolm Taylor Donald Stephenson Brian Moorhead Philip Webb Clive Barrie

Andy Dempsey Ray Sunby Cy Wallis Reg Thomason Richard Sheekey Alan

Crisp Michael Reynal Monty Morris Christopher Holmes Terry Sartain Harry

Fielder

Time Squad

Writer: Terry Nation (dead 9/3/97)

Director: Pennant Roberts

Aliens: Tony Smart Mark McBride Frank Henson

Walk-ons:

Roger Weighton Nigel Sibley Ian Lawrence Geoff Cryer Stephen Lyons John

Aston Gus Roy Roy Pierce George Fechter Paul Barry Barnie Lawrence Mark

Annandale

The Web  

Writer: Terry Nation (dead 9/3/97)

Director: Michael E. Briant

Saymon: Richard Beale

Geela: Ania Marson

Novara: Miles Fothergill

The Decimas: Deep Roy Gilda Cohen Ismet Hassam Marcus Powell Molly

Tweedley Willie Sheara

Seek-Locate-Destroy  

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Prell: Peter Craze

Bercol: John Bryans

Rontane: Peter Miles

Rai: Ian Oliver

Escon: Ian Cullen

Eldon: Astley Jones

Walk-ons:

Kevin Sullivan Franklyn Arbisman James Muir Alan Forbes Scott Thomas

Douglas Roe Terence Ward Mark Collins David Glen Jason Good William Wyatt

Michael Gordon-Browne

Mission to Destiny  

Writer: Terry Nation (dead 9/3/97)

Director: Pennant Roberts

Kendall: Barry Jackson

Sara: Beth Morris

Mandrian: Stephen Tate

Sonheim: Nigel Humphreys

Grovane: Carl Forgione (dead 10/9/98)

Pasco: John Leeson

Levett: Kate Coleridge

Raffor Brian Capron

Dortmunn: Stuart Fell

Duel  

Writer: Terry Nation (dead 9/3/97)

Director: Douglas Camfield (dead)

Sinofar: Isla Blair

Giroc: Patsy Smart (dead 6/2/96)

Mutoid: Carol Royle

Walk-ons:

Christopher Holmes Cliff Diggins

Project Avalon  

Writer: Terry Nation (dead 9/3/97)

Director: Michael E. Briant

Avalon: Julia Vidler

Chevner: David Bailie

Mutoid: Glynis Barber

Scientist: John Baker

Terloc: John Rolfe

Guards: David Sterne, Mark Holmes

Walk-ons:

Chris Homes Michael de Wilde Christina Halstead Roberta Kingsley Kelly

Varney Kavid Ianson Bruce Guest John Cannon John Jensen Doug Roe Peter

Dukes Bunty Garland Gaye Hopkin David Charles Monique Briant Jay Dyer

Breakdown  

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Kayn: Julian Glover

Farren: Ian Thompson

Renor: Christian Roberts

Bounty  

Writer: Terry Nation (dead 9/3/97)

Director: Pennant Roberts

Sarkoff: T.P. McKenna

Tyce: Carinthia West

Tarvin: Marc Zuber

Cheney: Mark York

Amagon Guard: Derrick Branche

Walk-ons:

Doug Charlton Rex Browne Bob Sutherland Ronald Nunnery John Aston Paul

Berry Bernie Lawrence Keith Norrish Derek San-Sellus Andy Dempsey

Geronimo Sehmi Neville Rofaila Roberta Gibbs

Deliverance  

Writer: Terry Nation (dead 9/3/97)

Director: David Maloney & Michael E. Briant

Meegat: Suzan Farmer

Ensor: Tony Caunter

Maryatt: James Lister

Walk-ons:

Ian Munro Harry Fielder Steve Kelly Ron Tarr Bill Hemmings Joe Santo Steve

Ismay James Linton Derek Suthern John Hogan Reg Woods Pat Gorman William

Perrie

Orac  

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Ensor: Derek Farr (dead 22/3/86)

First Phibian: James Muir

Second Phibian: Paul Kidd

Walk-ons:

Barry Hayes

Redemption  

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Alta One: Sheila Ruskin

Alta Two: Harriet Philpin

Slave: Roy Evans

Walk-ons:

David Charles Gordon Somers Paul Menzies Dave Ponting Peter Clare John

Curry Peter Roy Mike Mungarven Ray Faulkner

Shadow  

Writer: Chris Boucher

Director: Jonathan Wright-Miller

Bek: Karl Howman

Hanna: Adrienne Burgess

Largo: Derek Smith

The Enforcer: Archie Tew

The Chairman: Vernon Dobtcheff

Walk-ons:

Graham Kennedy Smith

Weapon  

Writer: Chris Boucher

Director: George Spenton-Foster

Fen: Kathleen Byron

Coser: John Bennett

Rashel: Candace Glendenning

Carnell: Scott Fredericks

The Officer: Graham Simpson

Walk-ons:

Harry Fielder Reg Turner Bob Smythe

Horizon  

Writer: Allan Prior

Director: Jonathan Wright-Miller

Ro: Darien Angadi (dead)

The Kommissar: William Squire (dead 3/5/89)

Selma: Souad Faress

Assistant Kommissar: Brian Miller

Chief Guard: Paul Haley

Walk-ons:

Kelly Varney Mark Kirby Martin Clarke Al Wade David Charles Paul Bassett

Ceri Morgan Adrian Varcoe Paul Strike Jay Eden Winn Samura Khan Mike

Kenwright Paul Menzies David Pople Brian Chaplin Les Hill John Curry Jennifer

Ellen Varlerie Hastings

Pressure Point  

Writer: Terry Nation (dead 9/3/97)

Director: George Spenton-Foster

Kasabi: Jane Sherwin

Veron: Yolande Palfrey

Arle: Alan Halley

Berg: Martin Connor

Mutoid: Sue Bishop

Walk-ons:

Sally Sinclair Ridgewell Hawkes James Muir Mark Holmes Patsy Peters Barbara

Hampshire Barry Summerford Maggie Pillea

Trial  

Writer: Chris Boucher

Director: Derek Martinus

Samor: John Savident

Bercol: John Bryans

Rontane: Peter Miles

Thania: Victoria Fairbrother

Par: Kevin Lloyd (dead 2/5/98)

Lye: Graham Sinclair

Guard Commander: Colin Dunn

Zil: Claire Lewis

Walk-ons:

Harry Fielder Derek Suthern Brian Moorehead Michael Finbarr

Killer  

Writer: Robert Holmes (dead 24/5/86)

Director: Vere Lorrimer (dead 1/10/98)

Bellfriar: Paul Daneman

Gambrill: Colin Farrell

Tak: Colin Higgins

Bax: Michael Gaunt

Tynus: Ronald Lacey (dead 15/5/91)

Wiler: Morris Barry

Walk-ons:

David Charles Gordon Somers David Pople Mark Alan Adrian Varcoe Tony

O'Leary David Glen Ray Chaney Bobby James Mark Kirby Robert Van

Kaphengs

Hostage  

Writer: Allan Prior

Director: Vere Lorrimer (dead 1/10/98)

Space Commander: Andrew Robertson

Mutoid: Judith Porter

Joban: Kevin Stoney

Ushton: John Abineri (dead 29/6/00)

Molok: James Coyle

Inga: Judy Buxton

Walk-ons:

Margaret Pilleau Walter Turner David Roy Paul Robert Smythe David Glen

Barbara Hampshire

Countdown  

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Tronos: Geoffrey Snell

Selson: Robert Arnold

Provine: Paul Shelley

Ralli: Lindy Alexander

Del Grant: Tom Chadbon

Arrian: Nigel Gregory

Vetnor: Sidney Kean

Cauder: James Kerry

Walk-ons:

Derek Suthern Peter Caton Tony Snell Robert Smythe Ray Knight Len Gilbey

Ernie Goodyear Peter Roy Toby Byrne

Voice From the Past  

Writer: Roger Parkes

Director: George Spenton-Foster

Glynd: Richard Bebb

Governor Le Grande: Frieda Knorr

Nagu: Martin Read

Walk-ons:

Harry Fielder Reg Turner Robert Smythe Count Princee Miller Ian Munro Reg

Woods Alva Shelley Judy Cowne Barry Summerford Jules Walter Karen Cooper

Pat Gorman Joe MacKlaine

Gambit  

Writer: Robert Holmes (dead 24/5/86)

Director: George Spenton-Foster

Krantor: Aubrey Woods

Toise: John Leeson

Docholli: Denis Carey (dead 28/9/86)

Chenie: Nicolette Roeg

Croupier: Sylvia Coleridge (dead 31/5/86)

Cevedic: Paul Grist

Jarriere: Harry Jones

Zee: Michael Halsey

The Klute: Deep Roy

Walk-ons:

Norman Bacon John Cannon Mike Mungarven Mark Kirby Jan Murzynowski Joe

Kaye Billy Gray Robert Smythe Derek Suthern Steve Kelly John Holland Ronald

Horn Barry Summerford Ridgewell Hawkes Stephen Kane Karen Cooper Karen

Apted Fay Hillier Donna Scarf Gita Santana Willow Sheno Rethna Ohjah

Mahjaraja Steve Margo Tawny Sands Arnold Lee Dave Holland Pat Gorman

The Keeper  

Writer: Allan Prior

Director: Derek Martinus

Gola: Bruce Purchase

Rod: Shaun Curry

Tara: Freda Jackson (dead 8/10/90)

Old Man: Arthur Hewlett (dead 3/97)

Fool: Cengiz Saner

Patrol Leader: Ron Tarr (dead 1997)

Walk-ons:

Steve Kelly Jan Murzynowski Jeff Howard Paul Taras Ridgewell Hawkes Eileen

Brady Eric French

Star One  

Writer: Chris Boucher

Director: David Maloney

Lurena: Jenny Twigge

Stot: David Webb

Parton: Gareth Armstrong

Durkim: John Bown

Marcol: Paul Toothill

Leeth: Michael Maynard

Searchers: Derek Broome, David Cann Pilot: Michael Spice

Controller: Hugh Dickson

Walk-ons:

David Glen William Wyatt Giles Melville Bobby James Christopher Holmes

Geoffrey Whiteson Mike Finbar Mark Allington

Aftermath  

Writer: Terry Nation (dead 9/3/97)

Director: Vere Lorrimer (dead 1/10/98)

Hal Mellanby: Cy Grant

Chel: Alan Lake (dead 10/10/84)

Lauren: Sally Harrison

First Trooper: Richard Franklin

Second Trooper: Michael Melia

Walk-ons:

Alan Mechen David Christian Bobby Webber Jason West Brian Montant

Powerplay  

Writer: Terry Nation (dead 9/3/97)

Director: David Maloney

Klegg: Michael Sheard

Harmon: Doyne Byrd

Lom: John Hollis

Mall: Michael Crane

Zee: Primi Townsend

Barr: Julia Vidler

Nurse: Catherine Chase

Receptionist: Helen Blatch

Walk-ons:

Bobby James Bruce Guest Ian Ellis Lara Shaw Sarah Tarr-Byrne Judy Towne Val

Clover Nikki Bunsford Sheila West Melinda Hall Nicola Kimber Michael Gordon

Browne Laurie Good Tony Christopher Alan Humphreys Perry Phillips

Christopher Holmes Pat Gorman

Volcano  

Writer: Allan Prior

Director: Desmond McCarthy

Hower: Michael Gough

Bershar: Malcolm Bullivant

Mori: Ben Howard

Mutoid: Judy Matheson

Battle Commander: Alan Bowerman

Robot: Guy Hassan

Milus: Russell Denton

Walk-ons:

Graham Jarvis Karen Burch Barbie Denham David Theakston Mark Uttley Ian

Bleasdale Tim Hindle Karen Cooper Jean Havilland Sue Barkshire Barry

Summerford Guy Standeven Rodney Cardiff Eric Harrison Keith Adam

Dawn of the Gods

Writer: James Follett

Director: Desmond McCarthy

The Caliph: Sam Dastor

Groff: Terry Scully

The Thaarn: Marcus Powell

Walk-ons:

Rory O'Connor Keith Norrish Jimmy Muir Barry Summerford Brian Massey

Kevin O'Brien Michael Leader Bruce Guest David Melbourne Bob Hargreaves

Steve Ismay Ridgeway Hawkes

Harvest of Kairos  

Writer: Ben Steed

Director: Gerald Blake (dead)

Jarvik: Andrew Burt

Dastor: Frank Gatliff (dead 23/6/90)

Shad: Anthony Gardner

Guard: Charles Jamieson

Carlon: Sam Davies

Labourer: Stuart Fell

First & Third Leader: Christopher Douglas I

Interceptor Captain: Hywel David

Walk-ons:

Tony O'Leary Ian Sheridan Reg Turner Alf Mangan Michael Bryden Salo

Gardner Malcolm Ross Michael Joseph Les Shannon James Haswell John

Cannon Peter Dukes Tom Gandl Peter Caton Richard SheekeyJean Havilland Sue

Barkshire Pat Gorman

City at the Edge of the World

Writer: Chris Boucher

Director: Vere Lorrimer (dead 1/10/98)

Kerril: Carol Hawkins

Bayban: Colin Baker

Sherm: John J. Carney (dead 24/2/95)

Norl: Valentine Dyall (dead 24/6/85)

Walk-ons:

Chris Chivers Ray Lavender Tony O'Leary Ted Lane Terence Creasey Michael

Brydon Rebecca Semark Patricia Clarke Judith Lund Teressa Critchley Derry

Jordan Dustin Lord Colin Lister Leo Kane Mark Uttley

Children of Auron

Writer: Roger Parkes

Director: Andrew Morgan

Deral: Rio Fanning

Ginka: Ric Young

Patar: Jack McKenzie

C.A. Two: Beth Harris

C.A. One: Ronald Leigh-Hunt

Franton: Sarah Atkinson

Pilot Four-Zero: Michael Troughton

Walk-ons:

Jim Haswell Robert Peters David Webb Tony Webb Jenny Elsden Jackie Elsden

Noel Flannigan Chris Flannigan John Cannon Harry Fielder Karen Cooper Jean

Havilland David Glen Johanna Briggs

Rumours of Death

Writer: Chris Boucher

Director: Fiona Cumming

Shrinker: John Bryans

Chesku: Peter Clay

Sula: Lorna Heilbron

Grenlee: Donald Douglas

Forres: David Haig

Balon: Philip Bloomfield

Hob: David Gillies

Walk-ons:

Reg Turner Tony O'Leary Ian Sheridan Nigel McLouchlan Michael Leader Peter

Roy Ray Knight Robert Smythe Tony de Cosy Ray Sumby Terence Creasey Pat

Gorman

Sarcophagus  

Writer: Tanith Lee

Director: Fiona Cumming

Walk-ons:

Val Clover Barbie Denham Celestine Carroll Sandra Arabian Karen Cooper

Martine Cherrell Wendy Smith

Ultraworld

Writer: Trevor Hoyle

Director: Vere Lorrimer (dead 1/10/98)

Ultra One: Peter Richards

Ultra Two: Stephen Jenn

Ultra Three: Ian Barritt

Relf: Ronald Govey

Walk-ons:

Jack Maguire Tony O'Leary Glen Hayes Hugh Cecil Norman Gay Stephen Kane

Reg Woods Ridgewell Hawkes Charles Rayford Tex Fuller

Moloch

Writer: Ben Steed

Director: Vere Lorrimer (dead 1/10/98)

Grose: John Hartley

Lector: Mark Sheridan

Doran: Davyd Harries

Chesil: Sabina Franklyn

Poola: Debbi Blythe

Moloch: Deep Roy

Walk-ons:

Peter Hannon Keith Norrish Tony deCosy Nikki Dunsford Mary Evelegh Stephen

Ismay Keith Guest Buddy Prince Len Gilbey John Clamp Mort Jackson

Death-Watch

Writer: Chris Boucher

Director: Gerald Blake (dead)

Karla: Katherine Iddon

Commentator: David Sibley

Max: Stewart Bevan

Vinni: Mark Elliot

Walk-ons:

Philip Webb Roy Seely David Bartlett

Terminal

Writer: Terry Nation (dead 9/3/97)

Director: Mary Ridge

Kostos: Gillian McCutcheon

Reeval: Heather Wright

Toron: Richard Clifford

Sphere Voice: David Healy (dead 25/10/95)

Walk-ons:

Deep Roy Nicholas Frankau Tony Christopher Peter Farmer

Rescue  

Writer: Chris Boucher

Director: Mary Ridge

Dorian: Geoffrey Burridge (dead 30/9/87)

The Creature: Rob Middleton

Power

Writer: Ben Steed

Director: Mary Ridge

Gunn Sar: Dicken Ashworth

Kate: Alison Glennie

Nina: Jenny Oulton

Cato: Paul Ridley

Luxia: Linda Barr

Pella: Juliet Hammond Hill

Stardrive

Writer: Jim Follett

Director: David Sullivan Proudfoot

Dr. Plaxton: Barbara Shelley

Atlan: Damien Thomas

Bomber: Peter Sands

Napier: Leonard Kavanagh

Animals  

Writer: Allan Prior

Director: Mary Ridge

Justin: Peter Byrne

Captain: William Lindsay

Borr: Max Harvey

Ardus: Kevin Stoney

Og: David Boyce

Headhunter  

Writer: Roger Parkes

Director: Mary Ridge

Muller: John Westbrook

Vena: Lynda Bellingham

Technician: Douglas Fielding

Android: Nick Joseph

Voice: Lesley Nunnerley

Assassin

Writer: Rod Beacham

Director: David Sullivan Proudfoot

Verlis: Betty Marsden (dead 19/7/98)

Nebrox: Richard Hurndall (dead 13/4/84)

Piri: Caroline Holdaway

Cancer: John Wyman

Benos: Peter Attard

Tok: Adam Blackwood

Servalan's Captain: Mark Barratt

Games

Writer: Bill Lyons

Director: Vivienne Cozens

Belkov: Stratford Johns

Gambit: Rosalind Bailey

Gerren: David Neal

Computer: Michael Gaunt

Guard: James Harvey

Sand  

Writer: Tanith Lee

Director: Vivienne Cozens

Reeve: Stephen Yardley

Chasgo: Daniel Hill

Servalan's Assistant: Peter Craze

Keller: Jonathan David

Computer: Michael Gaunt

Gold  

Writer: Colin Davis

Director: Brian Lighthill

Keiller: Roy Kinnear (dead 20/9/88)

Doctor: Antony Brown

Woman Passenger: Dinah May

Pilot: Norman Hartley

Orbit  

Writer: Robert Holmes (dead 24/5/86)

Director: Brian Lighthill

Egrorian: John Savident

Pinder: Larry Noble (dead 9/9/93)

Warlord  

Writer: Simon Masters

Director: Viktors Ritelis

Zukan: Roy Boyd

Zeeona: Bobbie Brown

Finn: Dean Harris

Boorva: Simon Merrick

Chalsa: Rick James

Lod: Charles Augins

Mida: Brian Spink

Blake

Writer: Chris Boucher

Director: Mary Ridge

Deva: David Collings

Arlen: Sasha Mitchell

Klyn: Janet Lees Price