Based on the BBC play, this is the story of the Jekyll/Hyde character of man; the gentle, understanding intelectual side (Cushing) vs. the ruthless, cruel and exploitational side (Forrest Tucker). The two men both seek the legendary Yeti, both with diffent agendas.
A suprisingly thoughtful monster movie (especially for the fifties), which turns genuinely creepy when the creatures show up.
Although one of Peter Cushing's first for THAT famous little British Studio, this intelligent, sensitive tale was one of Hammer's last forays into the sci-fi genre of the 1950s.