CBS has dropped the axe, or rather "damned up" Three Rivers"
http://www.hitfix.com/articles/2009-11-30-cbs-dams-up-three-rivers
Alex O'Loughlin's return to CBS was even briefer than his first stint.
CBS has pulled "Three Rivers" from its schedule effective immediately, moving "Cold Case" into the 9 p.m. slot. The 10 p.m. slot will be occupied by procedural repeats, starting with "NCIS: Los Angeles" this coming Sunday and "Criminal Minds" the week after.
http://www.hitfix.com/articles/2009-11-30-cbs-dams-up-three-rivers