'Labyrinth' by Art Wallace

A doctor takes a set of X-rays of an alien, but when the plates show no visible bone structure the alien is forced to kill the physician. David Vincent manages to obtain the X-rays plates, and takes them to Doctor Samuel Crowell, head of a government research group working on U.F.O's. At first he is welcomed, but is soon treated as a paranoid when he begins to suspect that Crowell’s daughter, Laura, recently returned from fifteen years in Europe, may in fact be an alien...

Roy Thinnes (David Vincent), Sally Kellerman (Laura Crowell), Ed Begley (Sam Crowell), James Callahan (Harry Mills), John Zaremba (Ed Harrison), Virginia Christine (Mrs. Thorne), Ed Peck (Darrow), E.J. Andre (Henry Thorne), Bill Quinn (Lt. Eaton), Martin Blaine (Argyle), Barbara Dodd (Miss Fox), Wilhelm von Homburg (Patient), William Sumper (Cabbie)
Directed by Murray Golden

A Quinn Martin Production

TX (US): 21st November 1967

Notes:
*Featuring David Vincent