While a couple vacations in London, the husband begins to act strangely, calling his wife "Theresa," and they become involved in espionage.

Paul Burke, Polly Bergen, Dinsdale Landen, Basil Henson, Vernon Dobtcheff, Meriel Brooke, William Job, Roger Hume, Larry Taylor, Betty Woolfe, Neville Phillips, Ted Richards, John Caesar

A businessman claims that he's being framed for his wife's murder and hires a private detective to investigate the case.