From This Might Be A Wiki
- Marty Beller replaces Dan Hickey at drums in early January.
- Shortly after Beller joins the band, the recording sessions for Here Come The ABCs begin and continue throughout the first half of the year, with the exceptions of "Clap Your Hands", which was previously released on the 2002 album No!, and "Here In Higglytown", which was recorded in 2003 for the show Higglytown Heroes. At the same time, the recording sessions for The Spine continue.
- On Cartoon Network's Home Movies, animated avatars of the Johns (as camp counselors, no less!) perform the songs "Taste The Fame", "I'm Just A Note", "Clean Bean", "Camp Campingston URGR8", and "Rabbit Troop Sucks".
- The Johns make their Homestar Runner debut, providing music for the song "Different Town".
- Indestructible Object is released on April 6th. It contains "Au Contraire" and "Memo To Human Resources", both slated to appear on the full length release The Spine.
- In April, TMBG's theme song for the television series The Wrong Coast is heard on the show's premiere.
- Flansburgh mentions This Might Be A Wiki in the email newsletter for May 5th.
- TMBG introduces the TMBG Street Team, a grassroots TMBG promotional effort.
- The music videos for Here Come The ABCs are created during the summer.
- TMBG embarks on their Venue Songs project, by creating a new song for many of the venues that they play on their summer tour.
- The TMBG Download Store opens its doors on July 1st.
- TMBG releases both The Spine and The Spine Surfs Alone (an EP) on July 13th. At approximately midnight EST, the official video for "Experimental Film" is added to homestarrunner.com.
- On August 31, TMBG releases The Spine Hits The Road, an iTunes exclusive download album of live performances.
- On December 9, TMBG releases Almanac, a mix of the best live recordings from the Spine tour along with Venue Songs exclusively online.
- The DVD for Here Come The ABCs is authored on December 14, rendering the album complete. Promotional copies are issued shortly after, in anticipation of its official release in February 2005.