I started watching Numb3rs a couple of seasons ago after my mom convinced me to give it a shot. Since then I've gotten hooked, keeping up with each new episode. I was concerned when the show was moved to a late-evening Friday slot, which I was afraid would be the end of it. I'm not sure if it was the time that directly led to Numb3rs cancellation, but either way, season six ended up being the end of the road for the show.
It seems like the writers knew the show was out of steam near the beginning of the season when they are started to wrap up different character's stories, and started neglecting the mathematics. I know the math angle has pretty much just a gimmick from the beginning to distinguish Numb3rs from the mass of police procedurals on television, but in the last season the writers seemed to get a little lazy with the math, and took it into places that didn't make much sense and making it even harder to believe. But hey, taken purely as part of the show, it worked fine.
The season opens with the engagement of Charlie (David Krumholtz) and Amita (Navi Rawat). Soon after, Larry (Peter MacNicol) turns down an opportunity to meet with mathematicians at CERN in Geneva and drops his course load for the following semester. Don (Rob Morrow) learns that his former mentor is crooked, forcing him to question himself and the meaning of his job. The show finally ends with Charlie and Amita's wedding and Don deciding to take a new direction in life away from the FBI.
The characters of Numb3rs are fairly well drawn and feel complex and real and, honestly, they kept me watching more than the story lines. It was interesting to see the characters grow and change over the course of the series, and for the most part, it felt natural (even though the ending for Charlie especially seemed a little abrupt).