Titre original : Botulism
John plots his revenge after being the repeated target of practical jokes. Dixie is worried about a student nurse, whose performances are affected by Dr. Brackett's personality. 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. Roy and John rescue a boy trapped in a collapsed building.