Ping Pong, Leaking Roof, Vacuum Cleaner Salesman

S1 E4: 1. Alvin's competitive nature gets the better of him after he wins his ping pong match against Elizabeth. 2. A thunderstorm awakens Elizabeth and Alvin, who discover their roof is far from repaired. 3. A vacuum cleaner salesman finds more than he bargained for upon visiting with Alvin and Elizabeth.