The best episode directed by Derek Martinus is "Spearhead from Space (3)", rated 8.6/10 from 7 user votes. It was "written by Robert Holmes". "Spearhead from Space (3)" aired on 1/17/1970 and is rated 0.4 point(s) higher than their second highest rated, "Spearhead from Space (2)".
Ransome manages to escape from the plastics factory and alert UNIT, prompting the Doctor and the Brigadier to start an investigation.
Director: Derek Martinus
Writer: Robert Holmes
UNIT's attempts to locate the meteorites are hampered by the mysterious plastic Autons, being constructed by Channing at a nearby factory, while the Doctor makes another attempt to escape from the hospital.
Director: Derek Martinus
Writer: Robert Holmes
With UNIT's investigation being blocked by the Replica of Scobie, the Doctor and Liz visit Madame Tussaud's to try and find out more as Channing prepares to activate the Autons.
Director: Derek Martinus
Writer: Robert Holmes
In 1986 a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.
Director: Derek Martinus
Writer: Kit Pedler
As the newly-regenerated Doctor arrives on Earth, so does the Nestene too.
Director: Derek Martinus
Writer: Robert Holmes
Whilst The Doctor, Steven and Vicki are traveling to their next destination. On the planet Kembel, Marc Cory, a Space Security Service agent discovers The Daleks are attending a secret meeting with their allies. Where Cory discovers the Dalek's evil plan, which sets the stage for the epic 12-part adventure "The Dalek Master Plan".
Director: Derek Martinus
Writer: Terry Nation