John plots his revenge after being the repeated target of practical jokes. A man breaks his back falling off a tower. A woman fakes an illness. Dr. Early's stethoscope becomes lodged in his ear. A man brought into the hospital from a movie set is the first indication of an outbreak of botulism. A boy is trapped in a condemned building.

• Jack Webb
• Robert A. Cinader
• Harold Jack Bloom

• Mark Harmon
• Kenneth Tobey
• Peter Palmér