 Many European models were tested for Helga Brandt including German actress Eva Renzi who passed on the film , with German actress Karin Dor being cast . Dor performed the stunt of diving into a pool to depict Helga 's demise herself , without the use of a double . Strangely , for the German version Dor was dubbed by somebody else . 
 Many European models <a href='uninflect' title='1'><mark>were</mark></a> tested for Helga Brandt including German actress Eva Renzi <a href='null_relcl' title='2'><mark>who</mark></a>passed on the film , with German actress Karin Dor being cast . Dor performed the stunt of diving into a pool to depict Helga <a href='null_genetive' title='3'><mark>'s</mark></a>demise herself , without the use of a double . Strangely , for the German version Dor was dubbed by somebody else . 
Many European models was tested fa Helga Brandt including German actress Eva Renzi passed on the film , with German actress Karin Dor bein cast . Dor performed the stunt of diving into a pool to depict Helga  demise herself , without da use of a double . Strangely , ffirthe German version Dor was dubbed by sumbody else .