"Dear Tim and Moby..."
Tim is a troubled and very smart middle school/high school scholar; and often is dragged into trouble by his friend, Moby, because of his reckless actions to Tim or someone else's property. These two are part of the BrainPOP community, answering letters of children having trouble and/or interested in a certain topic. Tim usually answers these letters very, very clearly, and at the end, usually Moby wrecks the show. In fact, one of the reasons Tim is on the FBI's Most Wanted List is because he deliberately sunk a whole US Navy Carrier Strike Group while answering someone's letter about warships (The video was later terminated due to disturbing content). Secretly, Tim has a crush on Rita, loves playing board games such as Chess (not with Moby though, because he always breaks the rules), and just enjoys having fun. Tim,Ben,Russel Simmons,and Annie are the only ones who understand Moby, or anyone that he wants to talk to.
- The design on Tim's white t-shirt always matches the topic of the episode.