Columbo visits Dr. Steadman, Vivian's psychiatrist, and confirms his suspicions about her fixation on his wife.

Columbo and Brady review the scene and confirm that nobody saw Vivian drive up to dispose of the gun.
Columbo pieces together the details about the office lights and explains how the killer staged the scene, while Vivian pretends to be friendly and even brings a gift for Mrs. Columbo.

Columbo questions Mr. Connolly. He also visits Vivian at her home, and she offers him lemon marmalade. He hates marmalade, but his wife loves it.