Answer: whoshotjr

AnswerCrossword Clue
WHOSHOTJRTV question of 1980
WHOSHOTJRAired on 11-21-1980, it was then the highest rated episode in TV history
WHOSHOTJRBig question of 1980s TV
WHOSHOTJR"People" cover poser, July 1980
WHOSHOTJRSummer of 1980 question
WHOSHOTJRBurning question of 1980
WHOSHOTJRBig mystery during the summer of 1980
WHOSHOTJROld TV cliff-hanger