Production No. 55 • BBC Broadcast Date: 02 Jan 71
Doctor: Jon Pertwee • No. of Eps: 4 • Total No. of Eps: 282
Companions: Jo Grant, UNIT
Villains: Master, Nestene, Autons
Producer: Barry Letts
Director: Barry Letts
Writer: Robert Holmes
Designer: Ian Watson
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Production No. 56 • BBC Broadcast Date: 30 Jan 71
Doctor: Jon Pertwee • No. of Eps: 6 • Total No. of Eps: 288
Companions: Jo Grant, UNIT
Villains: Master, Parasite
Producer: Barry Letts
Director: Timothy Combe
Writer: Don Houghton
Designer: Raymond London
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Production No. 57 • BBC Broadcast Date: 13 Mar 71
Doctor: Jon Pertwee • No. of Eps: 4 • Total No. of Eps: 292
Companions: Jo Grant, UNIT
Villains: Master, Axos
Producer: Barry Letts
Director: Michael Ferguson
Writer: Bob Baker, Dave Martin
Designer: Kenneth Sharp
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Production No. 58 • BBC Broadcast Date: 10 Apr 71
Doctor: Jon Pertwee • No. of Eps: 6 • Total No. of Eps: 298
Companions: Jo Grant, UNIT
Villains: Master, IMC
Producer: Barry Letts
Director: Michael Briant
Writer: Malcolm Hulke
Designer: Tim Gleeson
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Production No. 59 • BBC Broadcast Date: 22 May 71
Doctor: Jon Pertwee • No. of Eps: 5 • Total No. of Eps: 303
Companions: Jo Grant, UNIT
Villains: Master, Azal
Producer: Barry Letts
Director: Christopher Barry
Writer: Guy Leopold
Designer: Roger Ford
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