Scientist Faith Dukes wonders if there’s something wrong with her when she fails to couple up, and Cara Gael O'Regan is startled when she tests positive for syphilis.

Bri Riggio struggles to understand the psychology behind her eating disorder, and expert in global risk Seth Baum tries to find a solution to the threat of nuclear winter.

Molecular biologist Maryam Zaringhalam discovers something strange about her sense of smell, and Hillary Savoie’s daughter is born with a rare genetic mutation.

Bioethicist Elizabeth Yuko uses her science training to report a sexual assault, and engineer Selam Gano returns to her father’s village in Ethiopia for a water project.

Science communicator Brian Mackenwells tries to smuggle something onto the vomit comet, and comedian Jess Thom learns the best way to explain her Tourette's to someone new. 

Journalist Erika Check Hayden travels to Sierra Leone to report on Ebola, and psychologist Ali Mattu suffers from paralyzing social anxiety as a child.

Though Adam Becker loved science as a kid, he struggled in school -- until he met first-grade teacher Mrs. Brown.

When biologist Mary Ann Allen gets a chance to study Down syndrome, the disorder her dear childhood friend had, she jumps at the chance, but the results aren't what she expected.

When geneticist and science communicator Emily Grossman is invited to discuss women in science on TV, she doesn't know she'll be debating a legendary Internet bully.