Season 4 of B7 didn't really improve in any sort of curve, it just suddenly jumped to being good after a long trudge where it was very poor to just about mediocre. Much of this came from the addition of some fresh writers. While this does feature a new writer the improvement doesn't come yet, though; the new blood is Rod Beacham, who had mixed acting (best known to genre fans as an ill-fated Corporal in Doctor Who classic "The Web of Fear") with writing (largely for the radio up to this point). This was only his second television script (the first was a play) but presumably the production team were commissioning all sorts to make up for the loss of Terry Nation and Chris Boucher's decision to top and tail the series and otherwise concentrate on the editing side.
