Terry O'Quinn to Play Professor on Falling Skies

He's already battled a smoke monster. What are a few aliens to Terry O'Quinn?

The former Lost star, and current Hawaii Five-0 recurring player, has signed on for two episodes of TNT's Falling Skies. Look for him to appear this summer as a history professor who serves as a mentor to Noah Wyle's Tom Mason.

EW first reported the casting scoop.

Falling Skies averaged seven million viewers last year and was the highest-rated new drama on basic cable.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.