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 knew the area well. 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. The Doctor, Cassie and Jimmy became prisoners of the military. After discovering the military were working with the Viperox to gain control of the Earth, Cassie and Jimmy helped the Doctor defeat them. Cassie was devastated when the Viperox attacked the local town. She also helped Seruba Velak escape. After defeating the Viperox, the Doctor left Cassie and Jimmy with the job of rebuilding the town. (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 first two are Peri Brown and Grace Holloway