"Black Sheep Boy Appendix" is the fourth EP by indie band Okkervil River, released on November 22, 2005. This mini-album serves as a continuation of their 2005 release Black Sheep Boy and features a compilation of unfinished and reworked songs from that album. It also includes "Another Radio Song," a re-recorded and lyrically altered version of "For the Captain," a track originally featured on the band's 1999 debut album Stars Too Small to Use. Another notable track is "Black Sheep Boy #4," which is a re-recorded version of "Disfigured Cowboy," a song initially released on the Comes With a Smile issue #11 CD sampler. The song "Black Sheep Boy #4" was also featured in an episode ("One Night") of Cold Case.
The definitive double-disc CD version of the EP includes a video for "No Key No Plan," directed by the band's frontman, Will Sheff.
