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Dr. Robert Terwilliger, Sr. is a fictional character portrayed by John Mahoney in the TV series The Simpsons.
In the first episode they appeared in, titled Funeral for a Fiend (season 19), they were 67 years old.
They appear in 1 episodes out of a total of 768 aired so far

Dr. Robert Terwilliger, Sr.

by John Mahoney

character

Episodes1

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    Funeral for a Fiend
    episode S19.E8 november 2007
    Bart is responsible for Sideshow Bob's death after his latest attempt at revenge is foiled, but is his death actually part of the plan?