“The Long Fuse” – While investigating an explosion that kills two people, Sherlock discovers a crime that’s been lying dormant for years. Meanwhile, Watson encourages Sherlock to finally pick a sponsor, on ELEMENTARY, Thursday, Nov. 29 (10:01-11:00 PM, ET/PT) on the CBS Television Network. Lisa Edelstein (“House”) guest stars as Heather, the CEO of a high-end PR firm. Ato Essandoh (“Blood Diamond”) guest stars as Alfredo, who crosses paths with Holmes and Watson at a support group meeting.
According to the press release, the episode is airing on the 29th so I don't know why there wasn't a promo. ALSO, THAT ENDING!