El increíble profesor Zovek (1972)

A plane carrying 26 famed scientists blows up, but only 25 bodies are accounted for. Professor Zovek (in real-life, a famed mentalist/magician/athlete) must determine who the 26th person was, as he deduces he may not only still be alive, but also responsible for the explosion. What he discovers involves mind control experiments, as well as Island of Dr. Moreau-like mutations.