Noah Wyle once swapped the ER for an alien apocalypse in a series that approached the genre a little differently.

And the main character is The Pitt's Noah Wyle.

These days, Noah Wyle is known for playing Dr. Robby on "The Pitt," HBO's acclaimed medical drama praised for its realism. Less attention has been paid to "Falling Skies," an underrated sci-fi series ...