Captain Chin Lee's struggle against the Master's hypnotic control, forcing her to act against her own will and betray her duty.

Benton, surveilling Chin Lee in Cornwall Gardens, is suddenly incapacitated by a crippling headache triggered by the Keller Machine’s unseen influence. The machine’s pulsing imagery flashes as Benton staggers, clutching …

In the Master’s car outside the UNIT building, Chin Lee arrives late and is immediately subjected to his psychological dominance. The Master begins by humiliating her for tardiness, establishing his …