Young Sheldon: The complete fourth season

Disc. 1. Graduation

A docent, a little lady and a bouncer named Dalton

Training wheels and an unleashed chicken

Bible Camp and a chariot of love

A musty crypt and a stick to pee on

Freshman orientation and the inventor of the zipper

A philosophy class and worms that can chase you

An existential crisis and a bear that makes bubbles

Crappy frozen ice cream and an organ grinder's monkey. Disc 2. Cowboy aerobics and 473 grease-free bolts

A pager, a club and a cranky bag of wrinkles

A box of treasure and the meemaw of science

The geezer bus and a new model for education

Mitch's son and the unconditional approach of a government agency

A virus, heartbreak and a world of possibilities

A second prodigy and the hottest tips for pouty lips

A black hole

The wild and wooly world of nonlinear dynamics.