The Tonight Show with Jay Leno Season 15 Episode 23 Annette Bening, Mad Scientist David Willey, Sarah McLachlan

In season 15 episode 23 of The Tonight Show with Jay Leno, Jay welcomes actress Annette Bening to the show. Bening is known for her work in films such as "American Beauty" and "The Kids Are All Right," and she discusses her latest project with Leno.

Later in the show, Jay brings on the "mad scientist" David Willey. Willey is a science correspondent for "The Tonight Show" and is known for his wacky experiments and demonstrations. He showcases some of his latest projects and discusses the importance of science education.

Finally, musician Sarah McLachlan joins Leno on the couch to talk about her career in music and her advocacy work for animal rights. McLachlan is known for hits like "Angel" and "I Will Remember You," and she performs a special acoustic version of one of her songs.

Throughout the episode, Leno also delivers his trademark monologue and conducts humorous segments with his guests. The show is a mix of comedy, music, and interviews with some of the biggest names in entertainment.