A Blueprint for Murder (1953)

Two orphans, Polly and Doug, live with their stepmother Lynn; Polly collapses with the same mystery symptoms that killed her father. The kids' visiting uncle, Whitney Sargent, is warned that the symptoms match strychnine poisoning, but that poisoners are seldom detected and rarely convicted. Sure enough, no case can be made against the obvious suspect; so what can he do to save the next victim?

Genre: Mystery | Thriller | Drama

Country: United States of America  

themoviedb.org: https://www.themoviedb.org/movie/31560

IMDb: https://www.imdb.com/title/tt0045566/

Director(s) / Writer(s):

Andrew L. Stone

Cast:

Joseph Cotten

Whitney 'Cam' Cameron

Jean Peters

Lynn Cameron

Gary Merrill

Fred Sargent

Catherine McLeod

Maggie Sargent

Jack Kruschen

Detective Lt. Harold Y. Cole

Barney Phillips

Detective Capt. Pringle

Freddy Ridgeway

Doug Cameron

Pamela Duncan

Nurse (uncredited)

Mae Marsh

Anna Swenson - Lynne's Housekeeper (uncredited)

Bess Flowers

Club Patron

Trailer: