Series 1 — Episode 3
Square Root Of Evil
by Richard Harris
Production No 3367, VTR/ABC/1089
Production completed: January 21 1961. First transmission: January 21 1961.
Crew
| Teleplay by | Richard Harris regularThe SaintAdam AdamantPolice SurgeonThe Sweeney |
| from a story by | John Bryce regular |
| “The Avengers” Theme composed and played by | Johnny Dankworth regular |
| Designed by | Patrick Downing regular |
| Producer | Leonard White regularCallanPolice Surgeon |
| Directed by | Don Leaver regularCallanPolice Surgeon |
| Story Editor | John Bryce regular |
| Production Assistant | Barbara Forster regular |
| Floor Manager | Geoff Smith regular |
| Stage Manager | Nansi Davies regular |
| Call Boy | unknown |
| Lighting Director | Peter Kew regular |
| Operational Supervisor | Peter Wayne regular |
| Senior Cameraman | Michael Baldock regular (listed as Mike Baldock) |
| Sound Supervisor | Peter Cazaly regular |
| Vision Mixer | Del Randall regular |
| the AVENGERS NEXT WEEK NIGHTMARE | |
| An ABC Network Production | |
| Credits Legend: |
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Credited Credited but not listed in press Credited in press but not on screen Credited in paperwork only Uncredited / unattributed role Crew: 90% opacity ® : illustrated from other sources |