Season 2, Episode 15
|Airdate||December 27th, 1963|
|Starring||Bill Simpson; Andrew Cruickshank; Barbara Mullen|
|Previous||"The Deep End"|
|Next||"A Present from Father"|
"The Polygraph" is the fifteenth episode of season two of the British medical drama, Dr. Finlay's Casebook, and the twenty-first episode of the series overall. It was directed by George Spenton-Foster with a teleplay written by Alistair Bell. It first aired on BBC One in the United Kingdom on December 27th, 1963.