Numb3rs was cool, for a while. But they exhausted their good ideas for "solving crimes with math" before the first half of season 1.
The time I gave up was when Charlie announced he could use math to figure out the time the crime took place based on long the block of ice had been melting, which he could calculate based on ambient pressure and temperature and surface area and lots of extra things they made up. Or they could just look it up in a book.
I agree, although having Season 1 on DVD, I'd say they managed to do a decent amount of math in almost every episode of it (even if it doesn't always solve the crime). Then my wife and I bought Season 2 and were quite disappointed.
That said, in the episodes I've seen, Charlie is almost always treated as an important contributor by the other characters. His work is glamorized and treated with respect by the writing and production staff. He's awkward, but treated like a human.
The time I gave up was when Charlie announced he could use math to figure out the time the crime took place based on long the block of ice had been melting, which he could calculate based on ambient pressure and temperature and surface area and lots of extra things they made up. Or they could just look it up in a book.