The title refers to a special course for secret agents, designed to determine how much brutal interrogation the candidates are able to withstand. Tara King is summoned to undergo the course, willing if not eager to subject herself to its exacting rigors. What Tara doesn't know is that every agent who successfully completes the course ends up murdered a few days later. Christopher Lee guest-stars in "The Interrogators," which was written by Richard Harris and Brian Clemens; the episode debuted in England on New Year's Day 1969, and in America on January 20. ~ Hal Erickson, Rovi