Dinosaurs are all over London as Professor Whitaker initiates ‘Operation Golden Age’.
Doctor Who | Invasion of the Dinosaurs (Serial)
Invasion of the Dinosaurs: Part 5

Sarah discovers that the spaceship passengers are all victims of a deception.
Invasion of the Dinosaurs: Part 4

The Doctor is framed for causing the appearance of the dinosaurs.
Invasion of the Dinosaurs: Part 3

The Doctor captures a Tyrannosaurus Rex as Sarah falls into enemy hands.
Invasion of the Dinosaurs: Part 2

The Doctor plans to capture a dinosaur and discover who is bringing them through time.
Invasion of the Dinosaurs: Part 1

The Doctor and Sarah return to London but find the city deserted.