William Nils was a Human male who served as an officer in Earthforce, reaching the rank of Commander by the Earth year 2281. Nils was assigned to command the shut-down crew for the decommissioning of Babylon 5 and was present when John Sheridan arrived on the station.[1]


In a deleted scene, Nils can be seen to be combating an illness, being in bed and taking several cold medicines when informed of John Sheridan's arrival on Babylon 5.