Vic Fontaine is a fictional character who appeared in the sixth and seventh seasons of the American science fiction television series Star Trek: Deep Space Nine. Portrayed by James Darren, he is a holographic representation of a 1960s-era Las Vegas Rat Pack–style singer and entertainer, as part of a program run in the holosuites at Quark's bar. The character was developed from an idea by executive producer Ira Steven Behr, who had sought to introduce a character of that type during the fourth season to be played by Frank Sinatra, Jr. After Sinatra turned down the role, it was considered during the following season, to be played by Steve Lawrence, but once again was not used. Darren landed the role after Behr met him at a memorabilia show in North Hollywood and had him invited to audition.

Nog, played by Aron Eisenberg, is a recurring character on the science fiction television series Star Trek: Deep Space Nine (DS9). A member of the profit-driven alien species known as the Ferengi, he becomes the first Ferengi to join Starfleet, where he excels as first a cadet, and then an officer. He is the nephew of the Ferengi bartender Quark, a major character on the series; the son of Quark's brother Rom; and a close friend of Jake Sisko, the son of Deep Space Nine's protagonist Benjamin Sisko. Episodes of the series often paired Nog with Jake.