Guest Stars Dean McDermott as Constable Renfield Turnbull Jan Rubeš as Dr. Mort Gustafson Brent Stait as Vic Hester August Schellenberg as Gilbert Wallace Geoffrey Bowes as Larry Thea Gill as Tawny Brian Heighton as Sonar Operator David Ferry as John Thomas Janet Wright as Sgt. Sam Thorn Bradley Turton as Sailor Mountie
