Classic Doctor Who: The Fourth Doctor

The Guardian of Time gives the Doctor a difficult task - and a new assistant.

Garron tries to trick the Graff Vynda-K into buying the planet Ribos.

The Doctor and Romana are taken prisoner by the Graff Vynda-K.

The Doctor and Romana are pursued by the Graff and attacked by the ferocious Shrivenzale.

The Doctor faces new dangers when searching for the second segment to the Key of Time.

Romana has been seized by the Captain and the Doctor attempts to rescue her.

The Doctor and Romana attempt to attack the Captain with the help of the Mentiads.

The Doctor risks destroying the TARDIS as he tries to defeat the Captain and Queen Xania.

The Doctor's search for the third segment of the Key to Time takes him to a stone circle.

The stones from the ancient stone circle are alive and have a taste for human blood.

As the Ogri close in, the Doctor attempts to rescue Romana from hyperspace.

When the Doctor releases two alien justice machines from prison, he gets a death sentence.

Arriving on Tara, Romana is taken prisoner by the scheming Count Grendel.

Count Grendel is determined to become Tara's new monarch. Can the Doctor stop him?

As Romana escapes, the Doctor's life is put in danger by her android duplicate.

The Doctor is determined to prevent Grendal from ruling over the planet Tara.

On the third moon of Delta Magna, the Doctor and Romana are soon caught up in a conflict.

The Doctor arrives in time to save Romana from being sacrificed to the bogus god, Kroll.

With Kroll awake and angry, the Swampies are eager to sacrifice the Doctor.

The Doctor and Romana are appalled that Thawn intends to fire a rocket at Kroll.

The Marshal demands that the Doctor devise the ultimate deterrent against the Zeons.

As the Marshal prepares to launch his attack, the Doctor meets the commander of Zeos.

With Mentalis on a countdown to destruction, the Doctor takes desperate measures.

The Doctor and Romana arrive in the lair of the Shadow, who also seeks the Key to Time.

The Black Guardian threatens to plunge the whole of time and space into eternal chaos.