Admiral Sean Collins was a male Human who served in the Earth Starfleet, then later in the Federation Starfleet in the 22nd century. While speaking with Captain Jason Lambert of the starship Intrepid (NX-07) over subspace form Earth the signal was mysteriously lost. With no other vessel close enough, Collins requested the Vulcan ship Ni'Var be dispatched to investigate. (TNG novel: Indistinguishable from Magic)