Cassie Rice

Cassie Rice was a companion of the Tenth Doctor.

Biography
Cassie was in charge of a diner, after her mother ran off. She lived near Roswell and Area 51, and had good knowledge of the area. One day when she was serving coffee to her friend Jimmy Stalkingwolf, the Doctor walked in. After he activated a device from an alien crash landing, secret agent Mister Dread had a quarrel with Jimmy, forcing her to flee with the Doctor and Jimmy. (DW: Dreamland)

Behind the scenes

 * Cassie is voiced by Georgia Moffett, who previously played Jenny in DW: The Doctor's Daughter.
 * Cassie, along with Jimmy Stalkingwolf, is the fourth American companion the Doctor has had. The other two included Grace Holloway and Peri Brown.