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Episode guide

S1·E3 Square Root of Evil

Core Aired January 21, 1961

Synopsis

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.

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Frequently Asked Questions

When did Season 1 Episode 3 of The Avengers air?

Season 1, Episode 3 ('Square Root of Evil') originally aired on January 21, 1961.

How long is Season 1 Episode 3 ('Square Root of Evil')?

The episode follows the standard broadcast runtime for The Avengers.

What happens in The Avengers Season 1 Episode 3?

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....