Matlock S02 E13 The Body

"AMERICA'S GREATEST LAWYER. CASE CLOSED."

Matlock agrees to defend Donna Stewart when she's accused of murdering Christie Huntley, an aerobics instructor at Pinewood Spa who slept with her husband. Matlock soon realises that Christie's death had nothing to do with who she slept with and everything to do with why she slept with them.