David Hemmings as Dr. Henry Jekyll / Mr. Edward Hyde

Lisa Harrow as Ann

Ian Bannen as Oliver Utterson

Diana Dors as Kate Winterton

Clive Swift as Hastie Lanyon

Toyah Willcox as Janet

Roland Curram as Poole

Ben Aris as Inspector Newcomen

Desmond Llewelyn as Sir Danvers Carew