The former CSI: New York star has been cast in a series regular role as the “reclusive” EMT brother-in-law of Dean Norris’s Big Jim, according to The Hollywood Reporter. Cahill’s character Sam will reportedly form a bond with Rachelle Lefevre’s Julia, and it’s worth noting that a recent installment of Ask Ausiello described him as “the crazy drunk who lives alone in the woods.”
Meanwhile, British actress Karla Crome (Hit & Miss, Misfits) will join Cahill as a Season 2 regular in the role of Rebecca, “a teacher in her 30s whom Big Jim beseeches to start back up the school, though not with the noblest of agendas.”
RELATED | Scott Bakula Joins NCIS: New Orleans
Under the Dome‘s second season will premiere Monday, June 30 at 10/9c, and the opening hour will feature two major deaths.