Be sure to catch the new Christmas-themed episode ("The Polarizing Express") at a special time: December 15th at 9/8 Central. Another new episode ("Dead Bear Walking") will air directly after.
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.