CBS hit fantasy series Under the Dome has announced that two major character additions will be seen on the show once it comes back for second season this summer.

The Hollywood Reporter revealed that "CSI: NY's Eddie Cahill and Misfits grad Karla Crome have been tapped to be trapped under the mysterious dome." According to the report, Eddie Cahill will play as brother-in-law of Big Jim (played by Dean Norris), while Karla Crome will join the series as a teacher.

It isn't clear yet if Cahill will be on the good side or the bad side but basing on the reports, it seems that he and his brother-in-law have a bad blood and he might take part in revolt against Big Jim's reign under the dome. The Hollywood Reporter also teased that Cahill's character will also get in the way of Dale "Barbie" Barbara's (Mike Vogel) romance with Julia Shumway (Rachelle Lefevre).

"The actor is set to play Sam, Big Jim's (Dean Norris) brother-in-law. The character is described as a handsome recluse and former EMT who can hold his own against Big Jim and forms a deep connection with Julia (Rachelle Lefevre)," the report said.

On the other hand, Crome is a newcomer in the US television and Under the Dome will be her first drama. Her character in the show is described as beautiful, athletic, smart, tough, sexy, and Army brat.

While new characters are set to arrive, THR's Lesley Goldber said that some of the season one regulars will have to say goodbye. In his tweet earlier this month, he said:

Two new characters joining #UnderTheDome S2, and two "favorites" will die in premiere, being written by Stephen King. Back in June. #TCA14

It isn't clear yet who are the characters that are going to be killed off.