Gerry Duncan (played by Gerry Dee) uses the school's boxing match to settle a season-long rivalry with Mr. Dwyer . Gerry is determined to claim the title of "Mr. D" once and for all through a physical confrontation in the ring .

The title refers to the 12th episode of the first season of the Canadian sitcom Mr. D , which originally aired in 2012 . Episode Overview: "Charity Day"

In this season finale, the school hosts its annual Charity Day, an event meant for fundraising and community spirit that quickly devolves into a stage for personal vendettas .

Gerry hosts a boxing match at the school's annual Charity Day.