EXCLUSIVE: Sam (Rose McIver) and Jay (Utkarsh Ambudkar) are going to need help from James Austin Johnson to solve their latest problem in the Season 5 finale of CBS‘ Ghosts.

In a new clip from the upcoming two-parter, which Deadline can reveal exclusively, Sam and Jay are seeking to designate Woodstone Mansion a historical landmark to save it from demolition. Enter the town historian Joe, played by Johnson.

Landmark status won’t come easy, though, and unfortunately Joe deems Woodstone pretty “run of the mill” for mansions in that area. No one tell Hetty (Rebecca Wisocky). Speaking of the ghosts, the living residents of the upstate property, which Sam reveals was recently sold to an “evil water conglomerate,” are hoping their legacies might be enough to impress Joe.

Watch the clip above. The two-part Season 5 finale of Ghosts airs Thursday night.

Ghosts stars McIver and Ambudkar as a couple that inherits a rundown mansion in upstate New York that they decide to convert into a bed & breakfast. After a near-death experience, McIver’s character is suddenly able to see the ghosts that inhabit the house. Danielle Pinnock, Rebecca Wisocky, Brandon Scott Jones, Richie Moriarty, Asher Grodman, Román Zaragoza, Sheila Carrasco and Devan Chandler Long also star.

In addition to running the show, Joe Port and Joe Wiseman also serve as executive producers.