The Tonight Show Starring Johnny Carson Season 30 Episode 17 Jay Leno (guest host), Robert Stack, Steve Landesberg, Harry Connick, Jr.

Jay Leno steps in as guest host for Johnny Carson on season 30 episode 17 of The Tonight Show Starring Johnny Carson. Joining Leno on the show is actor Robert Stack, best known for his role as Eliot Ness in the television series The Untouchables. Stack talks about his initial reluctance to take on the role of Ness and shares stories about working with co-star Kevin Costner on the film version of The Untouchables.

Also appearing on the show is comedian Steve Landesberg, who is best known for his role as Detective Sgt. Arthur Dietrich on the television show Barney Miller. Landesberg performs a stand-up comedy routine that touches on topics like marriage, dating, and the differences between men and women.

In addition to the comedic guests, the episode features a musical performance by Harry Connick Jr. Connick has been a guest on The Tonight Show several times before and his smooth jazz sound is a perfect fit for the late-night atmosphere. Connick performs several songs throughout the episode, including his hit single "We Are in Love."

Throughout the episode, Leno proves to be a capable and entertaining host, keeping the show moving at a brisk pace and engaging with his guests in a playful and lighthearted manner. Fans of The Tonight Show will not be disappointed by this episode, which showcases both established and up-and-coming talent from the worlds of comedy, music, and television.