The Avengers Season 1 Episode 3
Square Root of Evil
Steed impersonates Riordan, a forger soon to be released from prison, and gains the trust of gang-leader Hooper. Things seem to be going well until Hooper's second-in-command, known as the Cardinal, announces that Riordan's girlfriend is outside waiting to see him.
- 1 - 26DragonsfieldDec. 30, 1961
- 1 - 25A Change of BaitDec. 23, 1961
- 1 - 24The Deadly AirDec. 16, 1961
- 1 - 23Dead of WinterDec. 09, 1961
- 1 - 22Kill the KingSep. 02, 1961
- 1 - 21The Far Distant DeadAug. 19, 1961
- 1 - 20The Tunnel of FearAug. 05, 1961
- 1 - 19Toy TrapJul. 22, 1961
- 1 - 18Double DangerJul. 08, 1961
- 1 - 17Death on the SlipwayJun. 24, 1961
- 1 - 16The Yellow NeedleJun. 10, 1961
- 1 - 15The FrightenersMay. 27, 1961
- 1 - 14The SpringersMay. 13, 1961
- 1 - 13One for the MortuaryApr. 29, 1961
- 1 - 12Dance with DeathApr. 15, 1961
- 1 - 11Please Don't Feed the AnimalsApr. 01, 1961
- 1 - 10Hunt the Man DownMar. 18, 1961
- 1 - 9Ashes of RosesMar. 04, 1961
- 1 - 8The Radioactive ManFeb. 25, 1961
- 1 - 7Diamond Cut DiamondFeb. 18, 1961
- 1 - 6Girl on the TrapezeFeb. 11, 1961
- 1 - 5Crescent MoonFeb. 04, 1961
- 1 - 4NightmareJan. 28, 1961
- 1 - 3Square Root of EvilJan. 21, 1961
- 1 - 2Brought to BookJan. 14, 1961
- 1 - 1Hot SnowJan. 07, 1961