At the annual family sleepover night at The Brewton Museum of Natural History, animal instinct takes over: Brooke has cold feet about Lex going to Mars, Simone reveals her unexpected true love, Vanessa surprises herself and Andy realizes he's been chasing the wrong girl all year.

Cast: Jill Kargman, Andy Buckley, K.K. Glick, Sean Kleier, Abby Elliott, Frederick Weller, Aimee Mullins, Stephanie March, Thomas Kopache, Byrdie Bell, Brandi Burkhardt, Molly DePietro, Erin Gerasimovich, Garrison Sobo, Madeleine Plener