Sym-Bionic Titan - Season 1 - Eps 15: Disenfranchised
Lance learns how to play the guitar, and General Steel sends a spy to Sherman High whom Octus convinces that there is connection between Titan and the school. A dragon-like Mutraddi, which was defeated earlier by Titan, comes back as a severed head during a concert but is destroyed by Illana and Octus with a hologram of the Manus armor, to give Lance an alibi with the General being at the concert.
About Sym-Bionic Titan

Title: Sym-Bionic Titan
First Air Date: 2010-09-17
Last Air Date: 2011-04-09
Status: Ended
Rating: 8.454/10 (from 163 votes)
Language: EN
Seasons: 1
Total Episodes: 20
Network: Cartoon Network
Genres: Action & Adventure, Animation
Production Companies: Cartoon Network Studios
Synopsis
Sym-Bionic Titan is an American animated action science fiction television series created by Genndy Tartakovsky, Paul Rudish, and Bryan Andrews for Cartoon Network. The series focuses on a trio made up of the alien princess Ilana, the rebellious soldier Lance, and the robot Octus; the three are able to combine to create the titular Sym-Bionic Titan. A preview of the series was first shown at the 2009 San Diego Comic-Con International, and further details were revealed at Cartoon Network's 2010 Upfront. The series premiered on September 17, 2010, and ended on April 9, 2011. The series is rated TV-PG-V. Cartoon Network initially ordered 20 episodes; Tartakovsky had hoped to expand on that, but the series was not renewed for another season, as the show "did not have any toys connected to it." Although Sym-Bionic Titan has never been released on DVD, All 20 episodes are available on iTunes. On October 7, 2012, reruns of Sym-Bionic Titan began airing on Adult Swim's Toonami block.
Cast

Brian Posehn
Octus (voice)

Tara Strong
Ilana (voice)