Part OneSeries Episode Number: 623
World Premiere: Thu 22 Mar 1984 - 6:41pm GMT [BBC One] (United Kingdom)
First Broadcast: Sun 16 Mar 1986 - 11:00pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 42 seconds
7.60 Million (UK)Appreciation Index: 61 (UK)
Chart Position: 66 () (UK)
The mysterious Professor Edgeworth has kidnapped twin human child genii, Romulus and Remus, and Hugo Lang holds the new Doctor responsible for the destruction of his spaceship.