The USS Challenger (NCC-2032) was a Federation starship in service to Starfleet in the late 23rd century. In 2293, the Challenger was conducting a deep space exploration mission near Klingon territory at the time of the proposal for Operation Retrieve. If the operation had been approved, the Challenger would have acted as a participant. (TOS movie: The Undiscovered Country)
- She was represented by a silhouette on the plans for Operation Retrieve.