Joan Crawford as Louise Howell

Van Heflin as David Sutton

Raymond Massey as Dean Graham

Geraldine Brooks as Carol Graham

Stanley Ridges as Dr. Willard

John Ridgely as Chief investigator of drowning

Moroni Olsen as Dr. Ames - Mrs. Smith's psychiatrist

Erskine Sanford as Dr. Sherman - Graham's physician at inquest

Peter Miles as Wynn Graham

Jakob Gimpel as Walter Sveldon - pianist

Isabel Withers as Nurse Rosen

Lisa Golm as Elsie - Graham's maid in DC

Douglas Kennedy as District Attorney at inquest

Monte Blue as Norris - lake house caretaker

Don McGuire as Dr. Craig - Dr. Willard's asst.

Rory Mallinson as Coroner's assistant

Clifton Young as Intern

Griff Barnett as Coroner