When does Wilfred return?

Wilfred is an American sitcom that aired from June 23, 2011 to August 13, 2014 for a total of four seasons. Based on the Australian SBS One series of the same name, it stars Elijah Wood and series co-creator Jason Gann, reprising his role of the eponymous dog. The series was adapted for the American television channel FX by Family Guy veteran David Zuckerman.