S4 E1: Graduation

S4 E2: A Docent, A Little Lady and a Bouncer Named Dalton

S4 E3: Training Wheels and an Unleashed Chicken

S4 E4: Bible Camp and a Chariot of Love

S4 E5: A Musty Crypt and a Stick to Pee On

S4 E6: Freshman Orientation and the Inventor Of The Zipper

S4 E7: A Philosophy Class and Worms That Can Chase You

S4 E8: An Existential Crisis and a Bear That Makes Bubbles

S4 E9: Crappy Frozen Ice Cream and an Organ Grinder's Monkey

S4 E10: Cowboy Aerobics and 473 Grease-Free Bolts

S4 E11: A Pager, a Club and a Cranky Bag of Wrinkles

S4 E12: A Box of Treasure and the Meemaw of Science

S4 E13: The Geezer Bus and a New Model for Education

S4 E14: Mitch's Son and the Unconditional Approval of a Government Agency

S4 E15: A Virus, Heartbreak and a World of Possibilities

S4 E16: A Second Prodigy and the Hottest Tips for Pouty Lips

S4 E17: A Black Hole

S4 E18: The Wild and Woolly World of Nonlinear Dynamics