• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Michael Keating (Vila), Robert Beatty (Bran Foster), Robert James (Ven Glynd), Jeremy Wilkin (Dev Tarrant), Michael Halsey (Varon), Pippa Steel (Maja), Gillian Bailey (Ravella), Alan Butler (Richie), Margaret John (Arbiter), Peter Williams (Dr. Havant), Susan Field (Alta Morag), Rodney Figaro (Clerk of Court), Nigel Lambert (Computer Operator), Garry McDermott (Guard)
• Written By: Terry Nation
• Directed By: Michael E. Briant

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Michael Keating (Vila), David Jackson (Gan), Glyn Owen (Commander Leylan), Leslie Schofield (Sub-Commander Raiker), Norman Tipton (Artix), David Hayward (Teague), Brett Forrest (Krell), Tom Kelly (Nova), Michael MacKenzie (Dainer), Bill Weston (Garton)
• Written By: Terry Nation
• Directed By: Pennant Roberts

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Michael Keating (Vila), David Jackson (Gan), Brian Blessed (Vargas), Glyn Owen (Commander Leylan), Norman Tipton (Artix), Pamela Salem (Kara), Robert Russell (Laran), Peter Childs (Arco), David Ryall (Selman), Peter Tuddenham (Zen)
• Written By: Terry Nation
• Directed By: Vere Lorrimer

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Tony Smart (Alien), Mark McBride (Alien), Frank Henson (Alien)
• Written By: Terry Nation
• Directed By: Pennant Roberts

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Richard Beale (Saymon), Ania Marson (Geela), Miles Fothergill (Novara), Deep Roy (Decima), Gilda Cohen (Decima), Ismet Hassam (Decima), Marcus Powell (Decima), Molly Tweedley (Decima), Willie Sheara (Decima)
• Written By: Terry Nation
• Directed By: Michael E. Briant

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Stephen Greif (Travis), Jacqueline Pearce (Servalan), Peter Craze (Prell), Peter Miles (Rontane), John Bryans (Bercol), Ian Cullen (Escon), Ian Oliver (Rai), Astley Jones (Eldon)
• Written By: Terry Nation
• Directed By: Vere Lorrimer

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Barry Jackson (Kendall), Beth Morris (Sara), Stephen Tate (Mandrian), Nigel Humphreys (Sonheim), Kate Coleridge (Levett), Carl Forgione (Grovane), John Leeson (Pasco), Brian Capron (Rafford), Stuart Fell (Dortmunn)
• Written By: Terry Nation
• Directed By: Pennant Roberts

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Stephen Greif (Travis), Isla Blair (Sinofar), Patsy Smart (Giroc), Carol Royle (Mutoid)
• Written By: Terry Nation
• Directed By: Douglas Camfield

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Stephen Greif (Travis), Jacqueline Pearce (Servalan), Julia Vidler (Avalon), David Bailie (Chevner), Glynis Barber (Mutoid), John Baker (Scientist), John Rolfe (Terloc), David Sterne (Guard), Mark Holmes (Guard)
• Written By: Terry Nation
• Directed By: Michael E. Briant

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Julian Glover (Kayn), Ian Thompson (Farren), Christian Roberts (Renor)
• Written By: Terry Nation
• Directed By: Vere Lorrimer

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), T.P. McKenna (Sarkoff), Carinthia West (Tyce), Marc Zuber (Tarvin), Mark York (Cheney), Derrick Branche (Armagon Guard)
• Written By: Terry Nation
• Directed By: Pennant Roberts

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Stephen Greif (Travis), Jacqueline Pearce (Servalan), Tony Caunter (Ensor), Suzan Farmer (Meegat), James Lister (Maryatt)
• Written By: Terry Nation
• Directed By: Michael E. Briant & David Maloney (uncredited)

• Cast: Gareth Thomas (Blake), Sally Knyvette (Jenna), Paul Darrow (Avon), Jan Chappell (Cally), Michael Keating (Vila), David Jackson (Gan), Peter Tuddenham (Zen), Derek Farr (Ensor), Stephen Greif (Travis), Jacqueline Pearce (Servalan), James Muir (Phibian), Paul Kidd (Phibian)
• Written By: Terry Nation
• Directed By: Vere Lorrimer