Due South: "The Mask"

In Episode 6 of Season 2, shown January 19, 1996 and written by Jeff King, Constable Benton Fraser of the Royal Canadian Mounted Police, working in Chicago, is awakened out of a sound sleep. 

He discovers two young kids, a boy and a girl, cavorting around his small apartment. Disheveled, he looks around wondering if he is still dreaming...

 

Grouchily, he climbs out of bed in his red union suit, in which he sleeps, to chase the kids out. But immediately he spies his old Native friend, Eric.

Fraser soon discovers, Eric's family has moved in overnight while he slept. He politely stands up to greet his friend's parents (in his long underwear):

  

Eric's parents are pleased to see him again as they have known Fraser since he was a boy.

Eric's mom takes notice of him standing there in only his union suit, but never mind, they have important things to discuss. But first, breakfast! Eric's mom is a very good cook.

Fraser learns that two, centuries old, aboriginal masks have been stolen from a Chicago museum and he has been approached by the family to find and return them. 

Unembarrassed since he knows the family so well, Fraser remembers he's standing there in just his underwear and decides it's time to get dressed and begin the search. He backs into his clothes closet to pull on his Mounty uniform over his long johns. 

You'll have to watch this episode and others on Daily Motion, YouTube and other streaming platforms to see if the masks are found and retrieved. 

Next up: Season 3, Episode 6, "The Bounty Hunter"