A Starfleet admiral who, with Maxwell Forrest, faces down Vulcan objections and approves Jonathan Archer's mission to carry the wounded Klingon Klaang home in 2151.
Admiral Leonard appears in Broken Bow, the opening episode of Enterprise. He is one of the senior officers of Starfleet Command at the time the first warp five starship is completed.
When a Klingon crashes in Oklahoma and is shot by a farmer, Leonard attends the tense meeting at Starfleet Medical. The Vulcans urge that the launch be delayed and that Klaang be allowed to die; Archer insists on taking him home alive.
Leonard and Forrest back Archer, sending Enterprise out ahead of schedule. He is named in tribute to Leonard Nimoy, just as Forrest honours DeForest Kelley.