Season 4 of Letterkenny premiered on Canadian video-on-demand service Crave on Christmas, December 25, 2017.
The first four episodes of the season were written by Jared Keeso and Jacob Tierney. "The Letterkenny Leave" was written by Jesse McKeown, and "Great Day for Thunder Bay" was written by Jonathan Torrens. All episodes were directed by Jacob Tierney.
|Overall No.||Season No.||Title||Synopsis|
|21||1||Never Work a Day in Your Life||It’s Gail’s birthday but in an effort to forget Rosie, Wayne is non-stop chorin’.|
|22||2||A Fuss at the Golf Course||The Hicks and the McMurrays defend the majestic Canada Goose down at the local golf course. The turf war for the Dollar Store continues.|
|23||3||Way to a Man's Heart||Tanis recruits the Hicks, who recruit the Hockey Players, to help with a feud on the Rez.|
|24||4||Letterkenny Talent Show||Letterkenny locals put their special skills on display with their very own talent show.|
|25||5||The Letterkenny Leave||The Hicks attend a hot tub party at the McMurray’s. The Hockey Players decide to do whatever it takes to get gains.|
|26||6||Great Day for Thunder Bay||The Bay Brothers return home for Hay and all of Letterkenny wants to be the one to throw them a party.|