You Said a Mouse-ful

S1 E2: Salem eats Sabrina's prize mouse for her science fair exhibit. After much blackmailing on Sabrina's part, she gets Salem to morph into a mouse to take its place. They win and Sabrina's on top of the world! That is until she finds out that Harvey traded the mouse (Salem) to NASA, who plan to send it up into space. Sabrina must recover Salem before he becomes an Astromouse.