Thelma Harper and her spinster sister Fran open their home to Thelma's recently divorced son Vinton and his teenage son and daughter. It's quite an adjustment for everyone, especially the cranky, argumentative Thelma.
The Harpers are chosen as the "typical American family" to be visited by Olga, a "typical Russian homemaker," who not only cleans their house inside and out but also decides to stay.
S4E18 21 min