Amy Acker and Jim Caviezel

Person of Interest is filling out its guest-star roster for the fall.

Justified's Emmy winner Margo Martindale will have a guest role on the show's upcoming sophomore season, as will Lost alum Ken Leung, CBS announced Tuesday.

The network did not elaborate on the casting, or offer details about what roles the actors would be playing, but Leung's presence opposite Michael Emerson will delight one subset of fans at least. It will be the first time the two have worked together since Lost.

Person of Interest premieres Thursday, Sept. 27 at 9/8c on CBS.