The Bennett-Blatt family is finally rescued from the sea only to discover Rachel’s mischievous and somewhat unpredictable dad-who relishes in being a doting but unruly Grandpa – has been kicked out of his retirement community and needs to move in with the family.

When the kids receive their standardized test scores, it's discovered that Blair is a genius!

When Owen is pranked at school, Grandpa Bennett, with the help of Blair and his old army buddy, Joey Coconuts, set out a night-long quest to get revenge.

After Grandpa crashes Byron’s car, he is “grounded” by Rachel, and has to stay at home. Owen quickly becomes frustrated that Grandpa is being loud and distracting while he and Ruth try to study.

Byron is excited that his mother is coming to stay with their family for a few days, but things turn ugly when Nana Blatt and Grandpa Bennett meet and immediately start to argue!