"When in Dome" is the twenty-second episode of the third season of Disney Channel's That's So Raven and the sixty-fifth episode overall. It aired on June 16, 2005. It was written by Sarah Jane Cunningham & Suzie V. Freeman and directed by Marc Warren.
Jennifer, an old friend of Chelsea's visits, and Raven becomes jealous when she realizes they have more in common with each other than she does with Chelsea. To try and save her friendship with Chelsea, Raven joins her in a Bio-Dome, and doesn't exactly get along with the ecosystem.
- Raven-Symoné as Raven Baxter
- Orlando Brown as Eddie Thomas
- Kyle Massey as Cory Baxter
- Anneliese van der Pol as Chelsea Daniels
- T'Keyah Crystal Keymáh as Tanya Baxter
- Rondell Sheridan as Victor Baxter
- Rheagan Wallace as Jennifer
- This episode featured a giant plant which resembled the Audrey II from The Little Shop of Horrors.