I liked this one. Roger Bloom is back to help ou with the case involving DB Cooper. What I liked about this one is that they showed a lot more of Roger as a person, not just the FBI agent who stole money just to get someone in jail and lost his career for it.
It was an interesting case and I think numb3rs needs all the extra character they can get to spice things up a bit. I'm not saying the show is boring but after the episode where Ian was framed for murder, the show needed a boost to get back on track. And it did, with the funny dude in the last episode and Roger Bloom on this one.
Anyways, overall, Numb3rs keeps delivering solid episodes.