The Avengers

Square Root of Evil

Series 1    Episode 3
January 21, 1961    TV-Y7
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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.
Directed By
Don Leaver
Written By
Richard Harris

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Cast of Square Root of Evil
  • Patrick MacneeJohn Steed
  • Ian HendryDr. David Keel
  • Delphi Lawrence
  • Alex ScottAverman
  • Michael RobbinsHenry Farrow
  • George MurcellNeedle
  • Heron Carvic

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