West Wing Season 1

[burgunder]

"Celestial Navigation" has two characters from Babylon 5 in it in the same episode, playing pretty much the same characters they played in Babylon 5.

The commander of Night Watch security force plays a police officer that arrests Supreme Court nominee Roberto Mendoza.

One of the Night Watch era reporter drones plays a reporter.

Heh.

Vaughn Armstrong
West Wing "Celestial Navigation" 2000 Sgt. MacNamara
Babylon 5 "Point of No Return", "Messages from Earth" 1996 Security Guard #1

Diana Morgan
West Wing (4 episodes 1999-2002) Reporter Jesse
Babylon 5 (3 episodes 1996-97) Reporter Alison Higgins