Boris and Minka have a fight and Boris runs away. Angelica, Tommy and Chuckie find him in the attic, because the door won't open from inside the attic, so to pass the time, Boris tells them the story of Passover, and Angelica imagines herself as the Pharaoh, Tommy as Moses, and the rest of the babies as slaves. Eventually, the rest of the adults (who were staying over to do Passover type things) find Boris and the kids, but the door blows shut, all are trapped, so Boris passes the time by telling another story.
Good episode. I Rewatched it for the first time in a while last night and thoroughly enjoyed it. There's not one dull moment, and the recurring gag of someone saying Boris' name and Minka going "Boris?!" and cries was funny, and not over-done, as running gags in episodes sometimes are. Good episode. A+ definitely