Here's how NBC describes the live episode: "When Jack tries to shut down live production of TGS, Kenneth teaches them all the lessons of live TV."
Jackson, who has also been seen on television in the Fox musical comedy "Glee," has appeared on Broadway in Finian's Rainbow, Xanadu and All Shook Up, among others. He has appeared Off-Broadway in Altar Boyz and The Agony and The Agony, and at City Center in Finian's Rainbow and Damn Yankees. For more on Jackson's theatrical history, visit the Playbill Vault.
"30 Rock" airs Thursday nights at 8:30 PM ET on NBC.