'The Disappearances' by Jerry Sohl and Luther Murdoch

A deranged scientist named Doctor Mary Smith kidnaps Elizabeth and takes her back to her base on a remote island off the coast of South America; here Elizabeth is drugged and put to work on a secret project with other abductees. Mark and Doctor Miller Simon join the crew of the Cetacean on a rescue mission – but can they infiltrate Smith’s heavily guarded complex and save their friend before she completes the sinister project...?

Patrick Duffy (Mark Harris), Belinda Montgomery (Doctor Elizabeth Merrill), Alan Fudge (C.W. Crawford), Robert Lussier (Brent), Richard Williams (Jomo), J. Victor Lopez (Chuey), Jean Marie Hon (Jane), Anson Downes (Allen), Fred Beir (Sub Captain), Ivor Francis (Doctor Medlow), Dennis Redfield (Dick Redstone), Pamela Peters Solow (Jane Smith), Darleen Carr (Doctor Mary Smith), Kenneth Tigar (Doctor Miller Simon), Ruth Manning (Clara)

Directed by Charles S. Dubin
Produced by Herman Miller

Executive Producer Herbert F. Solow

TX (US): 12th June 1977

Notes:
*Featuring Mark Harris, Doctor Elizabeth Merrill, C.W. Crawford and Doctor Miller Simon