What starts out as a casual family trip to a flea market turns into a guilt-stricken ordeal for Bob and Linda (voices of H. Jon Benjamin and John Roberts) as they are haunted by a lie they told their kids (voices of Dan Mintz, Eugene Mirman and Kristen Schaal) about what really happened to Wheelie Mammoth, their beloved stuffed animal, in the new episode "An Incon-wheelie-ent Truth." Guest voices include Megan Mullally, David Herman and Brooke Dillman.