As Harry says goodbye, the Doctor and Sarah face everything from Egyptian mummies, an evil Time Lord, android duplicates, a flesh-eating plant and the Loch Ness Monster!
An alien pod has been found and the Doctor rushes to investigate.
The TARDIS lands on the planet Karn where Dr Solon gives the Doctor and Sarah shelter.
The Doctor and Sarah arrive on present day Earth - or do they?
In England, 1911, the Doctor and Sarah encounter Sutekh, last of the Osirans.
The TARDIS picks up a distress call so the Doctor and Sarah go to investigate.
4/4 Inside the pyramid on Mars, the Doctor and Sarah must prevent Sutekh's release.
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