This was a most enjoyable episode and - at times, laugh out loud funny.
The ep follows around two of the average maintanance workers on B5, as a new alien menace threatens the station. On their journey through their days work (with all the chaos going on around them). Travelling throughout the station, helping and interacting with some of the main cast, we get to see everything with a different (and at times toungue-and-cheek) perspective.
Much like the stargate episodes featuring "the other guys", we get to see the show from a different, unique, and funnier side.
A great episode (even though it follows no major story arcs)