Gemma’s troublemaking sister, Brittany, returns, claiming she’s turned over a new leaf, thanks to a surprising new business venture. Also, Dave finally convinces Calvin to accompany him to an escape…

Dave’s patience is tested when Gemma’s freeloading sister, Brittany (Deborah Baker Jr.), suddenly shows up with plans for an extended stay. Also, Calvin grows frustrated that Malcolm is still living…

Max and Caroline get into a legal battle with two prep school teens who knocked off their cupcake T-shirts and are selling them.