It Takes a Thief (1968) - 1x14 - Locked in the Cradle of the Keep- Followmy.tv

Al meets Boris in an alley to make a ""swap"", information for money, as part of a plan by the S.I.A. to establish Al's cover as a defector and traitor. Noah pulls up in a car, start's shooting, and yells at Al that ""No agent goes double on me and lives to enjoy it"". Al then flies to an Eastern block country and makes contact with the ""underground"". Al learns from Ilsa, a member of the underground posing as his girlfriend, that his contact, Professor Gorokhov, was killed the night before. The underground does not know what Al has to steal, only where it is, and whatever it is, once revealed, will cause a great upheaval in most of the Iron Curtain governments. Ilsa takes Al to the State Museum and tells him that whatever he has to steal is in there. As to where in the museum it could be, all Ilsa can tell Al is what the professor's last words were as she got to him before he died, he said, ""The keep, the crib in the keep...""