Actress Marg Helgenberger Gives CBS2 A Sneak Peek At 'Under The Dome' Season Premiere

NEW YORK (CBSNewYork) -- Last summer's number one program "Under the Dome" returns Thursday night to CBS for a third season.

Fans can expect high-energy as residents of Chester's Mill race to discover why their town was suddenly cut off from the rest of the world by a mysterious force.

Emmy-wining actress Marg Helgenberger will try to help solve the mystery as she joins the cast this season.

Her character is not in the original Stephen King novel on which the show is based, instead executive producer Neil Beher created the role with Helgenberg in mind.

CBS2's Alex Denis sat down with Helgenberger to get a sneak peek at the premiere. Watch the interview above.

The 2-hour season premiere will air on CBS2 at 9 p.m.