Having watched this a few days ago, I have to say the evolution of Marcus from before the shooting of John Robson to after was interesting and I'm sure they'd have shown a lot of that b/c they were dedicated to flashbacks to Robson before the shooting (b/c John is listed as a series regular).

Also, imagine Marcus getting into Fox Mulder "Trust No One" mode b/c someone is leaking FBI intelligence to the bad guys. Oh, and he'd have won the girl over eventually. We all know it's true.

So much potential left in the trash can of some studio executive. Sigh.