In the third grade, Lylianna Allala finds out that her partner on the class solar system project isn't allowed to come over to her house, and after surviving leukemia in her childhood and becoming a cancer research scientist, Vicky Forster finds herself working alongside the same doctor who saved her life.

Journalist Sarah Kaplan normally covers the science beat, but when tragedy strikes in Las Vegas, she takes on an assignment unlike any she's had before, and while covering the devastating impact of an earthquake in Thailand, journalist Maryn McKenna reflects on tragedy in her own life.

As a marine biology student, Liz Neeley loves the order of science, but when a research expedition takes an unexpected turn, she must deal with the messy reality, and when Erin Barker is diagnosed with two chronic illnesses, she has to say goodbye to four of her favorite things.

When his students keep having “accidents" during nap time, kindergarten teacher Alvin Irby investigates, and in Aida Rosenbaum’s first month as a high-school science teacher, a fight breaks out between her students.

At 22 years old, Jenn Montooth is accepted to graduate school just as she discovers she's pregnant, and studying addiction as a neuroscientist gives Anna Miller a new perspective on her past.

When there's an explosion in the chemistry lab, graduate student Chanté Summers springs into action, and when Adriana Briscoe's professor accuses her of cheating, she scrambles to save her reputation and her spot on the biology lab's field trip.

After finally getting together in their forties, Chris Wade and his wife are determined to have a baby -- even if it means following some unconventional advice, and struggling to conceive, Sara Sweet makes her third attempt at intrauterine insemination just before her family's Christmas gathering.

A routine procedure with one of the primates in her lab becomes much more complicated when neuroscientist Paula Croxson cuts herself with the scalpel, and when surgeon Bhuvanesh Singh sees his patient back in the hospital months after what he thought was a successful surgery, he grapples with feelings of failure.

Luke Rosen signs his daughter up for a research study to find out what's causing her seizures and ends up having to fight to find the answers, and after doctors are unable to prevent her daughter's daily seizures, Tracy Dixon-Salazar decides to take matters into her own hands.

After Kenny Kinds begins lying to his parents about his grades, he has to question why he is in engineering school in the first place, and after a tragedy, Brianna Shaughnessy discovers a different way to heal at the Great Barrier Reef.