CBS Summer Schedule: Dome Gets New Home and Marg Helgenberger, Big Brother's Return and More

Under the Dome Season 3

Under the Dome Season 3 will unspool on a new night, premiering Thursday, June 25 at 9/8c, CBS announced as part of its summer schedule.

Also, CSI alum Marg Helgenberger will guest-staron the Stephen King novel-based drama this season for an extended arc, in an undisclosed role.

Kicking off CBS’ summer slate, Big Brother returns for Season 17 on Wednesday, June 24, at 8 pm. (The reality series will also air Thursdays and Sundays.)

CBS will opens the doors to its Zoo on Tuesday, June 30 at 9/8c. Based on James Patterson’s best-selling novel, the drama stars James Wolk (Political Animals) and follows a sudden wave of violent animal attacks against humans taking place across the globe.

Finally, Extant Season 2 — featuring a tweaked premise and cast, but still led by Halle Berry, launches Wednesday, July 1 at 10 pm. (This season, astronaut Molly Woods discovers she has unwittingly put the human race on a path to destruction, and that she and a mysterious stranger, played by Jeffrey Dean Morgan, may be the only hope for survival.)