Inside The Prisoner: Radical Television and Film in the 1960s
(Ian Rakoff, 1998)
on page 30, re: "The General":
"Standing out, though, was John Castle as Number 12. His deep, throaty voice had a certain integrity. There was something going on beneath the surface. Number 12 possessed an interior. Castle's performance alone possessed a quality that functioned in tandem with McGoohan's intensity. He carried it off convincingly but his part wasn't big enough to carry the entire episode."
The Official Prisoner Companion
(Matthew White and Jaffer Ali, 1988)
on page 45, re: "The General":
"Number Six found a true conspirator in this episode -- Number Twelve. The two of them joined ranks not to escape, but to prevent The Villagers from being brainwashed and manipulated. Number Twelve is one of the few heroes within The Village--a man in authority who is willing to put his career and possibly his life on the line for a noble cause."