“Head Cases” became the first cancellation of the 2005-06 prime-time season Thursday, when Fox canceled it after only two episodes.

The 9 p.m. (ET) show, produced by 20th Century Fox Television, co-starred Chris O’Donnell and Adam Goldberg as mismatched lawyers forced to work together after they are released from a mental institution.

“Head Cases” opened Sept. 14 with a 2.3 rating in the 18 to 49 demo. It dropped to a 1.3 in the demo this week.