Mr. Hearn is a fictional character portrayed by John Dennis Johnston in the TV series ER.
In the first episode they appeared in, titled Truth & Consequences (season 6), they were 49 years old.
They appear in 1 episodes out of a total of 331 aired
Episodes1
Truth & Consequences
episode S6.E5 november 1999A prank in a high school science class goes terribly awry, injuring a teacher and several students. Hathaway discovers Meg's drug addiction. Weaver and Greene notice Lawrence gets easily confused.