Enterprise is a fictional spaceship which appeared in the American science fiction television series Star Trek: Enterprise. It had the in-universe registration of NX-01 and appeared earlier in the franchise timeline than any other Starfleet ship named Enterprise. The producers of the series had originally intended to use an Akira-class starship as seen in Star Trek: First Contact (1996), but production designer Herman Zimmerman talked them into using a design with greater influence from Star Trek: The Original Series. Doug Drexler designed the exterior of the vessel, eventually arriving at the final design after also suggesting a Daedalus-class starship with a sphere-shaped primary hull, and a ship more reminiscent of the USS Enterprise (NCC-1701) complete with secondary hull.