From CTV:

9:30 p.m. – CORNER GAS – “Shirt Disturber” – ALL-NEW EPISODE
Brent (Brent Butt) and Hank (Fred Ewanuick) are on the outs after a trip to see their favourite comic book writer goes awry. Lacey’s (Gabrielle Miller) generous donations to the thrift store make the perfect gifts for Karen (Tara Spencer-Nairn) to celebrate her recent promotion. Oscar (Eric Peterson) and Emma’s (Janet Wright) new home alarm system causes more emergencies than Davis (Lorne Cardinal) bargained for.

From Jim Slotek of Sun Media:

• Butt says goodbye to Corner Gas, hello to new project
  “For most of the past five years that Corner Gas has been on the air, Brent Butt says, ‘I’ve been that guy on the plane, typing away on his laptop.’ Usually it was a script for an upcoming show, written somewhere in the air between his Vancouver home, meetings with ‘suits’ in Toronto and location shoots in Roleau, Saskatchewan.” Read more.