"Blue in the Face" is the ninth episode of the second season of Disney Channel's That's So Raven and the thirtieth episode overall. It aired on April 16, 2004. It was written by Maisha Closson and directed by Sean McNamara.
Raven must get a good grade on a science project, or else her mother will forbid her from going out with Devon to an upcoming concert. When Victor gets a new paper shredder, he becomes totally obsessed with it. Meanwhile, Cory's intelligent friend William needs a makeover. Raven makes a deal with William, to trade projects. William does his share of the deal, but Raven had forgotten about her part. When William and Cory get mad, they shred the project, which Raven had to fix up a night. Asleep from lack of sleep, she groggily and mistakenly tells Victor that her paper is trash. He shreds the paper and Raven gets mad. Then by accident at school, she ends up creating an unstable chemical reaction in the science lab, which causes Raven and Victor (who had come to bring Raven her formula project paper) to get covered in some sort of blue substance that will not wash off for a few days. Meanwhile, Cory meets a girl named Madison, but she does not like William, and Tanya asks Cory if he wants to be with one who hates his best friend. In the end, Cory chooses William over Madison.
- 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
- Devon standing outside Raven's bedroom with a boombox is a reference to the 1989 film Say Anything....