Throughout the mixtape, Tyler speaks to a character named Dr. TC, who acts as Tyler's therapist and guidance counselor. During the title track, Dr. TC hints at Tyler's debut album (2011's Goblin) to be an additional session with him, stating there will be three sessions. The songs "Odd Toddlers" and "Slow It Down" were previously released on The Odd Future Tape. A chopped and screwed version of the mixtape by Mike G also exists and was released online.
On the one year anniversary of its original release, the song "Session" was updated, replacing Brandun DeShay's verse with one by Mike G, after Tyler's falling out with DeShay. However the mixtape is now available on Odd Future's online music store with DeShay's vocals returning to the track. Tyler plans on re-releasing Bastard in a remastered physical form through their record label Odd Future Records.
On December 25, 2010, one year after the album's initial release, it was re-released with brandUn DeShay's verse on "Session" replaced by a verse from Mike G. However, in 2012, the album was re-uploaded to the official Odd Future website with both DeShay and Mike G credited on the song.
"Inglorious" contains uncredited vocals from Hodgy Beats.