Diagnosis Murder (1993–2001)
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The Last Laugh: Part 2 

After a court exonerates Bonnie Valin for her husband's murder, Mark learns that her alibi is fabricated. Mark strives to get her convicted without incurring double jeopardy. Meanwhile, Jack helps Amanda recover her swindled fortune.


Joyce Burditt (creator), Lee Goldberg | 1 more credit »

On Disc

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Episode cast overview, first billed only:
Dick Van Dyke ... Dr. Mark Sloan
Scott Baio ... Dr. Jack Stewart
Victoria Rowell ... Amanda Bentley-Livingston
Michael Tucci ... Norman Briggs
Delores Hall Delores Hall ... Nurse Delores Mitchell
Barry Van Dyke ... Steve Sloan
Dyan Cannon ... Bonnie Valin
Stephen Root ... Charlie Lane
Matthew Glave ... Roger Valin
Crystal Chappell Crystal Chappell ... Eve Laurie
Harley Venton Harley Venton ... Dr. Lloyd Fleming
Jack Blessing ... Special Agt. Matthew Dickerson
David Cromwell David Cromwell ... Wallace Sterling
Robin Sachs ... Art Thief
Edward Conery Edward Conery ... Peter the Artist


Bonnie Valin confesses to Mark she arranged for him to get her off for the greedy laughing gas murder on her husband plastic surgeon Elliot, trusting the double jeopardy rule renders her immune to prosecution. Steve is nearly demoted, and forced to prosecute the innocent son and true heir, Roger Valin. Meanwhile Jack is determined to get Amanda's embezzled trust fund back by posing as the seller and later buyer of the missing can of Campbell soup painting, for which he knows a perfect forger. Mark scares Bonnie, sees the life insurance refuses to pay and Roger contests probate which should take years and scares her hunky boyfriend and accomplice Dave McDonnell with a perjury prosecution- the answer is an attempt on Mark's own life, after which he believes missing Dave is murdered by Bonnie with rat poison, yet... Written by KGF Vissers

Plot Summary | Add Synopsis

Plot Keywords:

swindling | sting | pool | forgery | diving | See All (5) »


Crime | Mystery | Drama







Release Date:

18 November 1994 (USA) See more »

Company Credits

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Technical Specs

Sound Mix:




Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


The title is based on the old saying: He who laughs last, laughs best. See more »


When Dave tries to kill Sloane with the laughing gas, he holds the canister with his bare hands, which would make it easy to prosecute him. What's more, they could then flip him for conspiracy against Bonnie Valin to kill Sloane. See more »

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