In the fourth and final season of Wilfred, Ryan tries to figure out the truth behind "The Flock of the Grey Shepard".

Ryan and Wilfred's camping takes a sudden turn when an unexpected guest joins them.

The roles of Catherine and Bruce had to be recast after Mary Steenburgen and Dwight Yoakam were unable to reprise their respective roles due to scheduling conflict, and they were replaced by Mimi Rodgers and William Balwin.

The crew was given warning well ahead of time so the show's creators could tie up loose ends with the final season.

Wood himself has possession of a stuffed bear and a bong made from a Gatorade bottle, both featured prominently throughout the series.