Journalist Erika Check Hayden travels to Sierra Leone and sees Ebola up close and personal for the first time, and Richard Cardillo escapes his problems by joining a Catholic mission in Peru, where he becomes a community health organizer.

As a pediatrician in the 1980s, Ken Haller comes across a disturbing X-ray, and on her first day working in the White House under President Obama, microbiologist Jo Handelsman receives some bad news.

Data researcher Virginie Uhlmann struggles to send an important email, and after a panic attack, Shane Saunderson decides to rid his life of technology.

Stuck in the lab with buckets of jellyfish, Shreya Yadav must rethink why she's studying what she's studying in the first place, and underwater photographer Keith Ellenbogen comes face to face with an animal he wasn't expecting.

Even though he's an excellent student, and later a doctor, Dale Okorodudu finds that strangers perceive him differently, and Laura Bulk, who has been partially blind since she was a baby, struggles with strangers' attempts to "help."

Studying Marine Biology in Florida, Philadelphian Kory Evans feels like a fish out of water... while fishing, and Carla Katz finds out she has a brain aneurysm while getting screened for a kidney transplant.

In high school, Saad Sarwana decides to go from nerd to bad boy with a prank that he learned in chemistry class, and as a college student, Andrew Akira Hansen loves chemistry so much that he takes his experiments out of the lab and into the parking lot... and the shower... and anywhere else he could.

After leaving class early, Sonia Zárate gets a startling phone call about her daughter, and an indoor kid at heart, Sam Dingman goes on a hike anyways and ends up making a shocking discovery.

Erik Vance's first job reporting on scientific research doesn't smell as much like success as it smells like manure and Liz Neeley observes hypnosis from the inside when she becomes the subject of the experiment.

In difficult times, park ranger Gary Bremen takes solace in "sea hearts" that wash ashore, and when Dawn Fraser finds out that she and her twin brother, Dwayne, who was born with Down Syndrome, are one in a million, she searches for other twins like them.