The Time Warrior

STORYLINE

A spacecraft crashes near the castle of a robber baron in the Middle Ages, and the Sontaran Warrior within needs help with its repair. Unable to obtain the technical expertise he requires, he ventures forward in time to the 20th century and begins kidnapping scientists.

This attracts the attention of UNIT and the Doctor, who follows the trail back through time, unknowingly taking a young stowaway with him...