Night of the Big Heat is currently streaming on Tubi

Night of the Big Heat (1967)94 minHorror, Mystery, Science FictionRating 55/100

When a freak heat wave sends temperatures soaring on an island, a scientist seeks answers, while his sexy ex forces matters toward the boiling point.

Cast: Christopher Lee, Patrick Allen, Peter Cushing, Jane Merrow, Sarah Lawson, William Lucas, Kenneth Cope

Director: Terence Fisher