Ben Gazzara
Cmdr. Adrian Blake
Acting
Walter Pidgeon
Dr. Samuel Andrews
Acting
Ernest Borgnine
Chief Diver Don MacKay
Acting
Yvette Mimieux
Dr. Leah Jansen
Acting
Donnelly Rhodes
Diver Bob Cousins
Acting
Chris Wiggins
Capt. Williams
Acting
Mark Walker
Diver Dave Moulton
Acting
Leslie Carlson
Brigs, Triton Radioman
Acting
Stuart Gillard
Diver Phil Bradley
Directing
Michael J. Reynolds
Dr. Hal Hamilton
Acting
Kay Fujiwara
Anita, lab technician
Acting