The early Starfleet emblem was intended to be half-way between the present-day NASA logo and the familiar Enterprise arrowhead insignia seen in The Original Series. The emblem was also seen on the uniforms of some personnel at Starfleet Command, as well as on the Enterprise NX-01 crew jumpsuits in the final episode of the series. The Earth-Saturn probe mission patch was an allusion to "Tomorrow is Yesterday," an episode of The Original Series. In that episode we learned that the first Earth-Saturn probe was commanded by Captain Shaun Geoffrey Christopher. The patch indicates that the crew for this mission was Christopher, Fontana, and O'Herlihy, references to "Tomorrow is Yesterday" writer Dorothy C. Fontana and episode director Michael O'Herlihy.