A madman pushes a button and kills by phone. Would you answer?

A disgruntled phone company employee develops a device whereby those answering a phone can be murdered, and it's up to Nat Bridger to stop the killer.

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Main Cast: Richard Chamberlain, John Houseman, Sara Botsford, Robin Gammell, Gary Reineke, Barry Morse, Alan Scarfe, James B. Douglas, Ken Pogue, Neil Munro

Director: Michael Anderson

Writers: Michael Butler, Dennis Shryack, John Kent Harrison, James Whiton, George Armondo

Editor: Martin Pepler

Cinematographer: Reginald H. Morris

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