 In the original pitch for Star Trek: The Original Series by creator Gene Roddenberry, the vessel that the series was set on was called the SS Yorktown. The starship was subsequently renamed USS Enterprise before the start of the series because of the growing real world fame of the recently launched U.S. Navy aircraft carrier of the same name. The name Enterprise has been linked with Star Trek since. A second Enterprise made its debut in Star Trek IV: The Voyage Home (1986), suffixed NCC-1701-A. The fourth version was introduced in a third season episode of Star Trek: The Next Generation entitled "Yesterday's Enterprise". That series was set on the fifth version of the vessel, prefixed NCC-1701-D. The missing third Enterprise, prefixed NCC-1701-B, was introduced in Star Trek Generations (1994).
