Zack is a fictional character portrayed by Michael Angarano in the TV series ER.
In the first episode they appeared in, titled The Greater Good (season 10), they were 15 years old.
They appear in 1 episodes out of a total of 331 aired
Episodes1
The Greater Good
episode S10.E6 november 2003Pratt and Kovac clash over a miscarriage-prone young woman who arrives to deliver a premature baby. Pratt wants to make heroic efforts to save the unborn child, while Kovac is adamantly against spending vast amounts of money to keep the forever sickly baby alive.