Since its debut, "Big Bang" has maintained and built slightly on its "How I Met Your Mother" lead-in to become a solidly performing member of the CBS Monday comedy block. The most recent episode garnered a 3.1 rating, placing second in the half hour behind ABC's "Dancing With the Stars." Its pickup makes "Big Bang" the first comedy of the fall season to receive a full order.
"The Unit" only received a partial season order earlier this year. On Tuesday the show bounced 17 percent to a 3.5 rating—its best since February.