Mike's Murder 1984 ( 5.4)

Betty has a crush on her tennis instructor Mike. He promises to call her for a date, but never does – she doesn’t know he sells drugs on the side. After botching a deal on someone else’s turf, Mike has to disappear for a while. He contacts Betty – then he’s killed before they can meet. Betty tries to find out what happened, leading her straight into a hornet's nest of vice.