After passing out on the NYC subway, comedian Mike Brown is forced to take a deeper look at his mental health, and Emily Yarrison survives her suicide attempt and has to ask herself a whole new set of questions.

Heather Williams trades in her physicist labcoat for motherhood, and wonders if she can return, and Mary Garcia-Cazarin discovers she's pregnant just as she is offered a prestigious science policy fellowship, and worries about whether she can't cope with both.

A parent-teacher conference leads Eugenia Duodu to question whether she can be a scientist, and At 13 years old Misha Gajewski has to undergo a jaw surgery to fix a face she is just getting used to.

In a battle over her apartment's air quality, cat foster mom Tracy Rowland discovers how to use her kitten's parasite as a weapon, and Gianmarco Soresi learns more about cats than he ever wanted to when his girlfriend adopts five.

As a sixth grader, Anna Neu decides she's going to fall in love at science camp, and at age nine, Anicca Harriot plans to study both the heart and space, but as she gets older, that plan becomes more challenging than she expected.