'The Good Wife': T.R. Knight Debuts In 'Boom De Ya Da' (PHOTOS)

"The Good Wife" welcomes T.R. Knight in "Boom De Ya Da," its first episode of 2013. The "Grey's Anatomy" veteran will play Jordan Karahalios, a political adviser who joins Peter Florrick's campaign.

"Boom De Ya Da" also marks Michael J. Fox's return to "The Good Wife" as Louis Canning. Expect him to clash with Alicia (Julianna Margulies), as usual.

Here's how CBS describes the episode:

Will's latest case -- which could net the firm millions -- hangs in the balance as Alicia navigates Louis Canning’s attempts to delay a deposition crucial to Will’s argument. Meanwhile, Will and Diane make a stand against Clarke, and an old foe complicates things for Eli, on THE GOOD WIFE, Sunday, Jan. 6 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Michael J. Fox returns as Louis Canning and T.R. Knight guest stars as Jordan Karahalios, a political adviser who joins Eli on Peter’s campaign.

Check out photos from the episode below. "The Good Wife" returns with new episodes on Sunday, January 6 at 9 p.m. EST on CBS.