"Jericho" got a bit of an audience boost for its final episode compared to the previous week, but the series finale ended up with viewership just below its second season average. "Jericho" earned a 3.8 rating/6 share according to Fast National ratings from Nielsen Media Research Tuesday night, slightly below its season overnight average of 3.9/7, The numbers, however, were up nearly 9 percent over last week's audience, which was a series low. "Jericho" finished last in its 10 p.m. timeslot behind "Primetime" on ABC (7.0/12) and a rerun of "Law & Order: SVU" which gave NBC a 5.7/10. For the final time, "Jericho" didn't get much help from its lead-in, "Big Brother," despite holding nearly 100 percent of the reality show's audience. But that was after the network lost nearly 38 ...