'Ghosts' Sneak Peek: Sam Is Possessed by Thorfinn (Exclusive)

The two-part Christmas episode airs Thursday, Dec. 15 at 8 p.m. ET/PT on CBS. In Part 1 of the #Ghostsmas episode, when Jay’s sister, Bela (Punam Patel), returns to Woodstone Mansion for a holiday visit and brings along a platonic male friend, Sam (Rose McIver), inspired by the holiday rom-coms she adores, makes it her mission to spark a holiday romance between them. Meanwhile, the ghosts have conjured up a very different holiday plan -- also involving Bela. Also, Isaac (Brandon Scott Jones) has an awkward encounter with Nigel (John Hartman). In Part 2, Sam and Thorfinn (Devan Chandler Long) get caught in the crossfire as the scheme Bela and the ghosts have conjured up goes awry. Also, Isaac reflects on his marriage to Beatrice (Hillary Anne Matthews) as he deals with his feelings for Nigel.