|Boris Karloff||Cabman John Gray|
|Henry Daniell||Dr. Wolfe `'Toddy'` MacFarlane|
|Edith Atwater||Meg Cameron|
|Russell Wade||Donald Fettes|
|Rita Corday||Mrs. Marsh|
|Sharyn Moffet||Georgina Marsh|
|Donna Lee||Street Singer|
Dr. Toddy MacFarlane needs cadavers for his medical experiments, ultimately intended to treat a young disabled girl. However, they are not easy to come by, so he enlists the help of taxi driver John Gray and his assistant, Joseph, to unearth bodies from the cemetery. When Donald, Dr. MacFarlane's assistant, recognizes one of the corpses Gray delivers, the true source of the bodies is called into question.