The vanishing chalice is a rare Greek treasure that disappears from a museum. That's not all; the chalice vanishes while in full view of a group of nonplussed witnesses. This sounds like a case for troubleshooting detective Banacek (George Peppard) -- and indeed, it is, in this episode from the Banacek series. John Saxon, Sue Ann Langdon, Cesar Romero, and Eric Braeden are the special guest suspects in this episode, which originally aired January 15, 1974. ~ Hal Erickson, Rovi