Diagnosis: Murder - Season 2 Episode 9 The Last Laugh (1) A tangled web of mystery. Classic 'whodunit' suspense.
Overview: A plastic surgeon dies due to an overdose of laughing gas... with no shortage of suspects. Mark campaigns furiously to exonerate Bonnie Valin, the victim's wife, while Steve makes a solid case against her. Meanwhile, Amanda's new electronic checking service is less than effective.