The finale is to air March 26 and will be followed by the "Psych After Show," a one-hour live program, featuring a question and answer session with the entire cast and show creator, Steve Franks.
The moderated discussion will take place in front of a studio audience in Los Angeles.
"'Psych' has made an indelible imprint on the television landscape, with a unique brand of comedy," Chris McCumber, president of USA Network, said in a statement.
"The final season celebrates the iconic characters that have made this show so beloved, and will be an exclamation point on the series' incredible run. And while the series will wrap in March somehow I don't believe we've heard the last of Shawn and Gus."