Thunderbolts #31 was published by Marvel Comics on October 1, 1999, as part of a series that began in 1997. Glenn Alan Herdling and Kurt Busiek write, and art comes from Gregg Schigiel, Joe Rosas and Mark Bagley. This 36-page issue features Captain America, Hawkeye, Sam Wilson, Moonstone and Songbird, among 22 characters cataloged on VerseDB.