The Doctor has regenerated for the third time, he's behaving very erratically. Secret plans for the disintegrator gun are stolen and later the elements to construct it. Sarah gets into The Think Tank's premises, a group that looks into Science research, she discovers a room marked Professor Kettlewell (A specialist in robotics.) After a fruitless visit to the Professor she decides to break into the Think tank, where she encounters the Robot....
It does feel like a Pertwee episode with Tom Baker in it. By no means a bad thing, but better episodes were soon to follow.
Tom is wonderfully zany, he was always my Doctor. The charisma, energy and general craziness are a perfect mix for the role. His scenes with Harry are just insane. He has an amazing command of the screen.
Robot is a good use of Sarah Jane's character, she uses part of her character that seemed to get lost later on, that of the inquisitive journalist, she uses her own initiative in this one.
Hilda Winters is terrifying, more scary then any Dominator or Slitheen. I've always really liked Patricia Maynard, a really good actress.
Professor Kettlewell is wonderfully zany, the quintessential nutty Professor.
It's a very good story opener, wonderful that it's where Tom began. It is no wonder that many regard him the greatest ever, he had a definite other worldliness, very good start. 8/10