Dean Martin was an American singer and member of the Rat Pack.
In the Timeless Universe Edit
On September 21, 1962, Martin was performing with other members of the Rat Pack, including Sammy Davis Jr. and Frank Sinatra, at the Sands Hotel and Casino in Las Vegas. Notable audience members include President John F. Kennedy and mob boss Sam Giancana. As the Rat Pack performs the songs "Come Fly with Me", "Ain't That a Kick in the Head", and "Luck Be a Lady", Rufus Carlin, Lucy Preston, and Wyatt Logan are disguised in the audience as waiters looking for Garcia Flynn.
Dean Martin at Wikipedia