The younger Sinatra was technically not a "junior", as his father's middle name was Albert, but was nonetheless known as Frank Jr. throughout his life.

Keenan, Johnny Irwin, and Joe Amsler were soon captured, prosecuted for kidnapping, convicted, and sentenced to long prison terms, of which they served only small portions.

By 1968, he had performed in 47 states and 30 countries, had appeared as a guest on several television shows[citation needed] including two episodes of The Smothers Brothers Comedy Hour with his sister Nancy, hosted a 10-week summer replacement series for The Dean Martin Show, had sung with his own band in Las Vegas casinos, and had been the opening act for bigger names at other casinos.

[citation needed] His other acting credits included roles in Aru heishi no kake (1970) with Dale Robertson, Code Name Zebra (1987) opposite James Mitchum, and Hollywood Homicide (2003) with Harrison Ford and Josh Hartnett.

The United States National Archives now houses a 15-minute song and monologue composed by Sinatra in 1976, "Over the Land".

[14] Poet/vocalist Rod McKuen said: As the senior Sinatra outlived one by one all of his conductors and nearly every arranger, and began to grow frail himself, his son knew he needed someone that he trusted near him.

[15]In 1989, Sinatra sang "Wedding Vows in Vegas" on the Was (Not Was) album, What Up, Dog?, and performed the song live with the band on Late Night with David Letterman on March 23, 1989.

[16] During the 1997–1998 television season, Sinatra was offered the role of Vic Fontaine on Star Trek: Deep Space Nine.

Despite being a fan of the show and finding the role interesting, he turned it down, declaring that he only wanted to play an alien.

He had a guest spot playing himself in an episode of The Sopranos, "The Happy Wanderer" (2000),[citation needed] in a role either mocking or acknowledging all the stories about his father's involvement with the mob – he lets Paulie Walnuts refer to him as the "Chairboy of the Board".

Sinatra appeared in the show Family Guy, season 4, episode 19: "Brian Sings and Swings", wherein he was introduced as the "Member of the Board".

There aren't too many singers around with Sinatra's depth of experience in big band music, or his knowledge of the classic American songbook.