List of special guests
This page lists people who have played with Jonathan at concerts, categorized by the number of times they have appeared.
- Ian Schwartz
- Kristen Shirts
- Kristen Shirts' Ukulele Army
- Molly 
Jonathan frequently has a member of the audience or occasional guest star perform the "message redacted" line of Chiron Beta Prime.
- Molly may possibly be the only person besides Jonathan to have ever sang lead vocal on a song.