Starring: Frazer Hines, Suzanne Procter

It's been a long time since Jamie McCrimmon remembered anything about his travels with the Doctor, but his visit to Helicon Prime just won't stay hidden... but why remember their murder investigation now?

Starring: Peter Davison, Nicola Bryant, Caroline Morris

On a planet with no name, the Doctor struggles with a faulty memory and some killer plants. In a distant galaxy, Erimem leads a troubled empire. Back on Earth, Peri recalls the good old days when she used to travel with a man called The Doctor.

Starring: Peter Davison, Nicola Bryant

The Doctor and Peri take a holiday on the planet Gralista Social, but soon discover they aren't the only time-travelling aliens in town.

Starring: Peter Davison, Nicola Bryant

The Doctor and Peri take a holiday on the planet Gralista Social, but soon discover they aren't the only time-travelling aliens in town.

Starring: Noel Clarke, Maureen O'Brien, Sarah Mowat

The Earth Alliance is on the brink of victory in the Kedru System. But at what cost? Meanwhile, deep within the Dalek Empire, Susan Mendes prepares for her latest mission...