Apparently they wrote out the main cast to save a few dollars but this is good evidence the supporting cast can carry a show all by themselves. The characters are stuck in a bad spot after losing some of their union crew members and have to scramble to make the episode work. Not only are all the performances good but its a nice showcase of some of the lesser used characters. It has some funny moments but never quite as emotional or complex as most other episodes of the series.
If you only tune it to watch Matthew Perry, Amanda Peet, and Bradley Whitford you are missing out on a bunch of other good actors and this episode could bring you around.