First aired: Jun/24/1962
Guest star: Morris Perry (Alastair), Garfield Morgan (Reception Clerk), William Lucas (Duncan Weaver), Charles Morgan (Chief), Mike Pratt (Mac), Ray Barrett (Dr. Alan Whint)

First aired: Jun/30/1962
Writer: Leon Griffiths
Director: Jonathan Alwyn
Guest star: Nigel Stock (Dr. John Frame), Pauline Yates (Helen Carter), Peter Dyneley (Insp. Slinn), Richard Pasco (Michael Connor)

First aired: Jul/07/1962
Director: Guy Verney
Guest star: Gerald Flood (Black), Roger Snowdon (Robot), Maxine Audley (Dr Susan Calvin), Hayden Jones (Walensky), Clifford Evans (Major-General Kallner)

First aired: Jul/14/1962
Director: Peter Hammond
Guest star: Peter Wyngarde (Captain Barton), Peter Williams (Commander Delhart), Patrick Holt (Selfe), Jane Asher (Lee Cross), Richard Gale (Gerry Cross), Godfrey James (Perry), Piers Keelan (Ship's Records Clerk), William Marlowe (Bill May)

First aired: Jul/21/1962
Writer: Terry Nation
Director: Peter Hammond
Guest star: Alec Ross (Landon), John Carson (Roger Carter), Paul Bacon (Security Chief), Patrick Allen (Major Peters), Keith Anderson (Paul Kirby), Angela Browne (Jean Baron), Glyn Owen (Frank Nelson), Philip Anthony (Alan Richards), Colin Rix (Control), Walter Randall (Mute-O)

First aired: Jul/28/1962
Writer: Terry Nation
Director: Guy Verney
Guest star: Anthony Bate (Garfield), Norman Jones (Monroe), Julian Glover (Dave Sheridan), Ann Lynn (Betty Madison), William Gaunt (Bill Sheridan), Jerry Stovin (Dr Polk), Aubrey Morris (Tyler), Donald Douglas (Adams)

First aired: Aug/04/1962
Writer: Julian Bond
Director: Richmond Harding
Guest star: Peter Madden (Pienster), Alan MacNaughtan (Dr Harmon), Jacqueline Hill (Lil Harmon), Vic Wise (Sam Barrett)

First aired: Aug/11/1962
Writer: Bruce Stewart
Director: John Knight
Guest star: Kenneth Watson (Bud), Milo O'Shea (Jacob Luke), Reginald Marsh (Colonel Ford), David Hemmings (Journalist), Gary Wyler (Alien), Frank Gatliff (Commander), Judy Cornwell (Butch), Roger Avon (Major Race)

First aired: Aug/18/1962
Writer: Richard Waring
Director: Don Leaver
Guest star: David Lander (Schreiber), Joan Heath (Harriet Brocklebank), Robert Lankesheer (Mr. Daventry), Derek Newark (Inspector Wright), William Job (Harold), Philip Grout (John), Cameron Miller (Mr Hoggin), Donald Webster (Youth), Sheena Marshe (Nancy), Edward Dentith (Major Bentley), Maurice Denham (Edgar Brocklebank), William Buck (Reporter), Godfrey Quigley (The Great Vorg), Barry Wilsher (Shop Assistant), John Frawley (Furrier), Richard Klee (Reg Herbert), Evan Thomas (Second Furrier), Jennifer Wilson (Freda Hoggin), Terence Woodfield (Benjy Hoggin)

First aired: Aug/25/1962
Writer: Leon Griffiths
Director: John Knight
Guest star: John Barcroft (Burrows), Ronald Radd (Dr Waldron), Ann Bell (Jean Bailey), Piers Keelan (`Eddy'), Ian Clark (Sheen), Kenneth Keeling (Passenger), Norman Scace (Dr Exner), Bernard Horsfall (Dr. Arthur Bailey), Clive Morton (Sir Gerald Christie), Bill Mills (Prison Guard), Gerald Harper (Colonel Tanner)

First aired: Sep/01/1962
Writer: Denis Butler
Director: Peter Hammond
Guest star: Keith Pyott (Asst. Com. Lucas), Bruce Beeby (Commander Delabo), William Dexter (Supt Hartley), Vanessa Thornton (Miss Guthrie), Rosemary Miller (Joan Thurgood), Yvette Rees (Mrs Chalmers), John Moore (Dr Kendal), John Garvin (Jim Thurgood), Michael Hawkins (George Chalmers), Jerome Willis (John Irvine), Ronald Wilson (Det Sgt Grant), Barrie Cookson (Dr Howard)

First aired: Sep/08/1962
Writer: Terry Nation
Director: Jonathan Alwyn
Guest star: Jill Melford (Kimonian Employment Officer), Penelope Lee (Pat), Ian Shand (Kimonian Man), Gary Hope (Roberts), Jo Rowbottom (Elaine), Bruce Boa (Monty Archer), John Horsley (Morley), Gary Raymond (Selden Bishop), Vivienne Drummond (Maxine), Donald Eccles (Father), Christine Shaw (Maggie)

First aired: Sep/15/1962
Director: Alan Cooke
Guest star: Susan Marryott (Mary Hoff), Dinsdale Landen (Jon Hoff), Philip Madoc (George Mathias), Hugh Janes (Jon (as a boy)), Anne Tirard (Mrs. Kane), Paul Eddington (Joe Manx), Edwin Finn (Martin), Michael Golden (Jon's Father), Bert Palmer (Joshua)

First aired: Sep/22/1962
Writer: Bruce Stewart
Director: Charles Jarrot
Guest star: Jill Curzon (Bubbles), Charles Gray (Abel Jones), Geraldine McEwan (Mary Jones), Sheree Winton (Girl), Patricia Mort (Miss Cook), Edwin Apps (Mr Crampsey), John Cater (Fred Smith), Alister Williamson (Mr Starling), Ronald Fraser (Oscar Raebone)