7.1
/10
Insane Duane is a fictional character portrayed by Todd Grinnell in the TV series How I Met Your Mother.
In the first episode they appeared in, titled Symphony of Illumination (season 7), they were 35 years old.
They appear in 1 episodes out of a total of 208 aired

Insane Duane

by Todd Grinnell

character

Episodes1

  • 8.7
    /10

    Symphony of Illumination
    episode S7.E12 december 2011
    After Robin tells Barney that she's pregnant with his child, she receives some shocking news from her doctor. Meanwhile, a neighborhood teen plays a trick on Marshall while he decorates his house with Christmas lights.