Part TwoSeries Episode Number: 383
World Premiere: Sat 4 Jan 1975 - 5:32pm GMT [BBC One] (United Kingdom)
First Broadcast: Wed 27 Feb 1980 - 5:30pm CST [WTTW 11 Chicago]
Running Time: 25 minutes
10.70 Million (UK)Appreciation Index: 53 (UK)
Chart Position: 17 () (UK)
Recorded on Wed 22 May 1974 in TC3
Using the deadly disintegrator weapon, the robot steals the destructor codes. Harry Sullivan is sent to infiltrate Think Tank to discover the truth.