'The Immortality Pedlars' by vonquixote
Our heroes land in ancient Byzantium and encounter a man who appears to have cracked the secret to Immortality. This episode has jokes, a song, ethical and theological dilemmas, and SCIENCE.
All you need to do is record a few lines of dialogue and send them in for us to listen to. If you get cast, it'll be a few hours of group recording with fellow fans, which people generally seem to agree is a fun thing to do of an evening.
Click here for more information and audition lines.