The Creeper is a 1948 American horror film directed by Jean Yarbrough. The film stars Onslow Stevens as a mad doctor whose serum turns a man into a catlike killer.

Plot

Two scientists on an expedition to the West Indies discover a serum which changes humans into cats, or, more precisely, into catlike killers. One believes they should continue with their experiments and the other does not, the disagreement costing the latter his life. Several deaths occur before the first scientist is halted in his mad plans.