Set in 1962 in the small town of Argo, Alabama, In the Heat of the Night centers on attempts by the local police to determine who is responsible for a dead body found on the road on a hot August night. It's a difficult challenge considering they have no witnesses, no motives and few clues. Students from Cuyahoga Community College present the play tonight at 7:30 at the Simon and Rose Mandel Theatre on the Eastern Campus. A performance also takes place at 7:30 tomorrow night and at 2 p.m. on Sunday. Admission is free for Tri-C students with ID. Tickets are $10 for adults and $8 for seniors or students from other schools.Reduced rates also are available for groups of 10 or more. (Niesel)