Square Root of Evil
Show: The Avengers --> Season: 1 - Series 1
AirDate: 1/21/1961
Runtime:
Voting: 0 (0)

Overview: 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.