[Note: All three leading stars, who experienced troubled lives of their own, suffered premature deaths under unusual and ragic circumstances - a car crash at age 24 in 1955, a mysterious drowning at age 43 in 1981, and a stabbing-murder at age 37 in 1976.(voice-over, during the credits, later identified as Tommy Doyle)"When Michael Myers was six years old, he stabbed his sister to death.He reminded them that they were united: "Our hearts beat as one" and their bonds of friendship would continue, so that Diggory""s death would not be in vain.He was angered when his assistant interrupted him, and not knowing that his doting daughter Dorothy (Maureen O""Sullivan, better known as "Jane" from two Tarzan films) and future son-in-law Tommy (Henry Wadsworth) had arrived." He falsely claimed: "I""m not that eager." When she said her temperature (or "body heat") was normally high or elevated (hence the film""s title), he quipped: "Maybe you need a tune-up," to which she answered - with a sexy double entendre:Don""t tell me.