Doogie tries to help an elderlypatient whose memory is failing him. Meanwhile, Vinnie has an introspective video experience.
The Captain faces an IA investigation when the name "C. Devane" is found on the debtor list of a mob accountant murdered while under police surveillance.
A man sends his troubled son to Nels Oelson for the summer. Nels enlists the help of Charles Ingalls to get to the heart of the boy's behavior.
The Great Santini is a master magician, but his employer discovers that he was a German camp guard during World War II and blackmails him. Santini is forced to engineer a perfect murder--he kills the owner while apparently performing his famous "water tank" illusion on stage in front of dozens of witnesses. Santini in fact supposedly hides out beneath the stage, and uses a radio transmitter to convince a waiter that he is there when he's busy killing the owner. Now Columbo must unravel a magical mystery and break a perfect alibi.moreless
In Portugal, Solo is taken prisoner by Pharos Mandor, a Thrush chief ready to defect if his arch rival, Thrush assassin Stepan Valandros, does not kill him first. Solo meets Mandor's girlfriend, Cathy Welling. Mandor tells Solo U.N.C.L.E. must kill Valandros or he will not defect, but his real aim is to eliminate Valandros and promote himself up the Thrush ranks.moreless
Kelly and Scotty have a meeting scheduled in Marrakesh, but get sidetracked after they agree to help an elderly man leave the country before he is killed by assassins.