Threatened by a doctor's kindness toward Tammy, Mark tries to get her an exotic animal; Hank bonds with the chimpanzee via its bluetooth; David's dog saves David and Mernft Man from a pet snake.
When David, Andrea, Mark, and Tammy go on a cruise together, David and Andrea unexpectedly rekindle their romance; Mark's preoccupation with reeling in a big fish leads to him catching a whale that jeopardizes the safety of the entire cruise.
Mark hangs out with his stepson, Darren; David receives an unexpected package.
When Tammy is upset that an elite country club only takes men, Mark joins it to supposedly change things from within; Tammy's passion for the club infuriates the owner's wife, Ellen; Mark's entry into the club ruins the natural order.
Jealous of the attention Tammy gets for saving the life of a choking stranger, Mark buys a Jaws of Life to efficiently save lives; Tammy's life is threatened when she rejects the advances of Paul, the stranger she saved.
Mark buys himself a Superbowl ring and leverages it to get special treatment at the Eagles game; Hank has an adventure with cutting-edge mascot technology.
When Mark and Hank travel for their uncle's funeral, Hank gets in trouble with the TSA; Mark puts his piloting skills to the test after incapacitating the real pilots.
Mark, Tammy, Hank and Darren discover a magical board game; David seeks a solution to his writer's block.
Mark writes a hit song that becomes the next Baby Shark, and enlists his family and neighbors to join his management team; David tries to capitalize in Mark's wake by resuscitating his old and out of touch climate change educational magic act.
After feeling slighted by a Navy recruiter, Mark sets out to join an elite unit of the Marines, only to be thwarted by his inability to properly make a bed; David teams up with a veteran, who reveals stories that are stranger than fiction.
Mark accidentally murders Hank with a crossbow while hunting a deer; Mark's neighbor David struggles to keep deer from eating his garden.