S1·E20 The Therapist

Matlock is hired to defend a popular actor when he's accused of killing the man who ran the sex-therapy clinic where he was staying, ostensibly for releasing his name to the press. He's got a temporary thorn in his side, though, in the form of Cassie Phillips, a law student he once made an off-hand comment to about looking him up for a job...she took him a lot more seriously than he had intended.