No, your eyes aren't playing tricks on you.
Bob Newhart is a marathon runner in this sprightly made-for-TV movie. A mild, middle-aged suburbanite with the requisite loving wife (Anita Gillette), Newhart is smitten by gorgeous female jogger
Leigh Taylor-Young. "Accidentally" arranging to meet the object of his affections during subsequent jogging jaunts, Newhart ends up joining Leigh in entering the grueling New York Marathon. Though the film makes light of vicarious adultery, screenwriter Ron Friedman remains scrupulously within the bounds of good taste, as does Jackie Cooper's gentle direction. Marathon was first broadcast January 30, 1980. ~ Hal Erickson, All Movie Guide