Characters played by Bent Mejding
Svend Viltorft
Characters played by Asbjørn Andersen
Prof. Otto Martens
Characters played by Povl Wøldike
Dr. Peter Dalby
Characters played by Ann Smyrner
Lise Martens
Characters played by Mimi Heinrich
Karen Martens
Characters played by Dirch Passer
Petersen
Characters played by Marlies Behrens
Connie Miller (American version)
Characters played by Carl Ottosen
Gen. Mark Grayson
Characters played by Ole Wisborg
Capt. Einer Brandt
Characters played by Birthe Wilke
Self - Nightclub Singer
Characters played by Mogens Brandt
Police Chief Hassing
Characters played by Kjeld Petersen
Police Officer Olsen
Characters played by Jens Due
Journalist
Characters played by May Reimers
Badegæst
Characters played by Jørgen Blaksted
Naval Officer
Characters played by Robert Cornthwaite
Man
Characters played by Børge Møller Grimstrup
Danish Farmer
Characters played by Egon Gydesen
Danish Soldier
Characters played by Knud Hallest
Naval Officer
Characters played by Svend Johansen
Naval Officer
Characters played by Benny Juhlin
Danish Soldier
Characters played by Dirk Melchior
Farmer Eaten by Reptilicus
Characters played by Bodil Miller
Connie Miller (Danish version)
Characters played by Hardy Rafn
(uncredited)
Characters played by Martin Stander
(uncredited)
Characters played by Alex Suhr
Alex - Drilling Crew
Characters played by Poul Thomsen
Orlogskaptajn
Characters played by Claus Toksvig
Self - Narrator
Characters played by Bent Vejlby
Danish Soldier
Characters played by Alfred Wilken
(uncredited)