Be sure to catch the fifth season finale episode ("Yang 3 in 2D") on December 22nd at 10/9 Central. It features the return of the series villains Mr. Yang (played by Ally Sheedy) and Mr. Yin.
Psych returns with all-new episodes in November.
Actor Nestor Carbonell (Lost) will be guest starring in a multi-episode story arc in the fifth season. He'll be playing Declan Rand, a criminal profiler who ends up being Shawn's rival, both professional as well as romantic. His first episode will be "Shawn 2.0", which airs on September 1, 2010.