Episode 10: The Paradise Lost Affair
Original Airdate: November 22, 1966

Thrush is determined to crush the economies of the countries bordering the Pacific by creating new submarine smuggling lanes. They finish laying out the plans on a ship in the South Pacific. Mark swipes the plans and instigates a mutiny. April and Mark are forced to abandon ship and the plans are lost. April washes up on a tiny Island and is captured by the ruler. Mark to the rescue! Unfortunately, the ship's captain also survives the wreck and washes up on the island.

Episode 11: The Lethal Eagle Affair
Original Airdate: November 29, 1966

April is tied atop a car being attacked by an eagle as part of an experiment by a retired Thrush agent, Gita Vlander. From inside Gita, Thrush agent Egon, and Gita's scientist watch. The scientist has a molecular reorganizer and aims it at the eagle. The eagle vanishes and turns up in a cage behind Egon. Gita assures him it works on people, too.

Episode 12: The Romany Lie Affair
Original Airdate: December 6, 1966

The owner of Circus Sadvaricci returns to his circus after a financial killing and is confronted by the Countess who knows he has caused her financial ruin. Sadvaricci kills and buries her when she threatens to expose him for stock market manipulation, enter UNCLE. April goes under cover in his circus as an aerialist.

Episode 13: The Little John Doe Affair
Original Airdate: December 13, 1966

A big time gambler, Joey Celeste, has contacted UNCLE with an offer to inform on his bosses. April is sent to Italy to escort him to UNCLE headquarters. However, his old bosses have learned of his intention. They hire a notorius hitman who has never failed to miss his mark to eliminate Celeste.

Episode 14: The Jewels of Topango Affair
Original Airdate: December 20, 1966

April is lured off and drugged in an African airport where she his waiting for Mark. When she recovers, Mark is gone. April is sent to Topango to stop a plot that includes killing the King and stealing the country's diamonds.

Episode 15: The Faustus Affair
Original Airdate: December 27, 1966

Professor Quantum has created a seemingly useless machine that extracts the color out of everything in it's wake. A stranger, however, offers the Professor anything he wants in exchange for the Light Variator. April, posing as a lab assistant, has been sent to keep an eye on Quantum and he has fallen in love with her. The professor decides that what he really wants is his "lab assistant" and he's willing to turn over the machine if his wish is granted.

Episode 16: The U.F.O. Affair
Original Airdate: January 2, 1967

A crime syndicate learns that it is being investigated by April. The boss, Dossetti, orders her killed but one of his men finds her appealing and kidnaps her to be part of his harem. The syndicate intends to create a diversion with a UFO and to raid the Royal Palace.

Episode 17: The Moulin Ruse Affair
Original Airdate: January 17, 1967

UNCLE has received information on an attack by Dr. Vladimir Toulouse. He has created a pill that gives superhuman strength to anyone who takes it and has threatened to unleash a superhuman army unless a ransome is paid.

Episode 18: The Catacomb and Dogma Affair
Original Airdate: January 24, 1967

April and Mark are in Venice to capture Horsch, a top-ranking crook. April manages to grab him and the three set off for the Yugoslavian border. When border guards board the train on which they are passengers, Horsch escapes. April gives chase, following him to a villa where she is captured and drugged. Meantime, Mark is trying to trace April and they eventually uncover a plot to loot the Vatican.

Episode 19: The Drublegratz Affair
Original Airdate: January 31, 1967

The King of Drublegratz is dying. The heirs to the throne are his three sons, but THRUSH wants to take over the country. They send Dr. Igor Gork with his sound projector. As one of the sons drives across a bridge, Dr. Gork uses the projector to destroy it. April and Mark are sent to prevent any further deaths in the Royal Family.