The swing standard that Benjamin Sisko and the holographic singer Vic Fontaine perform together on the stage of Vic's lounge at the close of Badda-Bing, Badda-Bang.
The Best Is Yet to Come is a twentieth-century Earth song from the repertoire of the Las Vegas crooners whom Vic Fontaine's holosuite programme recreates. It is heard in the seventh-season Deep Space Nine episode Badda-Bing, Badda-Bang.
In that story a hidden feature of the programme hands Vic's lounge to the gangster Frankie Eyes, and the station's officers stage an elaborate casino robbery to win it back. Sisko at first refuses to take part, objecting that the Las Vegas of 1962 was no place of welcome for people like him, but Kasidy Yates persuades him.
With Frankie removed and the lounge restored, Vic invites the captain on stage and the two sing the number as a duet for the assembled crew, one of the last carefree moments before the end of the Dominion War.