Black Light Attack!

"Black Light Attack!" is the tenth episode of the fourth season of the American television comedy series 30 Rock, and the 68th overall episode of the series. The episode was written by Steve Hely and directed by series producer Don Scardino. It originally aired on NBC in the United States on January 14, 2010. Guest stars in this episode include Dr. Sanjay Gupta and Cheyenne Jackson.

In the episode, TGS with Tracy Jordan head writer Liz Lemon (Tina Fey) and new cast member Danny Baker (Jackson) further their relationship, while their boss Jack Donaghy (Alec Baldwin) becomes jealous and plans to break them apart. Meanwhile, movie star Tracy Jordan (Tracy Morgan) recruits TGS writer Sue Laroche-Van der Hout (Sue Galloway) into his entourage, and Jenna Maroney (Jane Krakowski) auditions for a role on Gossip Girl. This episode was Jackson's third appearance as Danny.

"Black Light Attack!" received generally mixed reception from television critics. According to the Nielsen ratings system, it was watched by 5.014 million households during its original broadcast, and received a 2.3 rating/6 share among viewers in the 18–49 demographic. Its rating constituted a 30 percent drop from the December 2009 episode "Secret Santa". For her performance in this episode, Jane Krakowski received a Primetime Emmy Award nomination in the category for Outstanding Supporting Actress in a Comedy Series.