See Spencer for other articles with titles that contain, either by relationship or by coincidence, this character's surname.

Shirley "the Cat" Spencer was a Human female serving in Starfleet in the 23rd century. By 2267, Spencer held the rank of commodore and served as commanding officer of the USS Hoyle. That year, when the Hoyle detected the ancient Earth colony ship Stephen Hawking, Spencer contacted Starfleet and told them what she had found. (TOS novel: Across the Universe)