This category is for episodes where a character previously unknown debuts.
Note that this refers to official debuts. For a character to officially debut, they need to make a physical appearance in an episode, and be properly introduced in that episode (i.e their name being mentioned). The following episodes do not count:
- Voice appearances; Lillian and Mitchell's mothers have yet to have an official debut.
- Mentions; characters like Sean's father have been mentioned, but have not officially debuted.
- Dr. Rafferty's appearance in Beep Has the Blues; her official debut was in Visit to Mom's Office.
- Zerk's voice being heard in Earth Mission to Moon and Whole Lotta Shakin'; his first physical appearance was in Back to Bortron 7.
- Amy Skelley's cameo in Jet Can't Sleep; her official debut was in Commander Mom.
All items (14)