Oh Give Me a Home Where the Mathers Don't Roam

Plot:

Joe and Brian are tired of Lowell, who has been staying with them since Brian sank his boat, bossing them around want him out of the house, so they try to get him to buy his own place. But when they find him staying at the airfield instead of his new place, they learn that Lowell has never been on his own before. But when Roy tells him a "story" about his "brother" whom he never saw after he "left", Lowell decides to give it a shot.