In Babylon 5 seasons 2-3 (maybe further, but that's as far as I've got), the sinister Orwellian organisation known as 'Nightwatch' is established as a sort of secret police, a way for Clark and Minipax to keep a network of spies on the station.
In its early appearances, as far as I remember, the organisation was recruiting all sorts of people, ordinary citizens; Garibaldi's second Zack was one of the few security personnel who joined. But by the time of the pivotal episode "Point of No Return", it seems that Nightwatch is primarily based in security, and at the end of the episode Sheridan and co
seemingly neutralise Nightwatch just by drawing all the Nightwatch security personnel into one place.
Am I remembering wrongly and Nightwatch was always recruiting mostly or only among station security? If not, what happened to all its other members by the time of "Point of No Return"?