After ending up in the ER for the third time, Rachel Alvarez struggles to understand what’s going on with her health, and as a young adult with muscular dystrophy, Monkol Lek refuses to give up on his ambitions.

Neuroscientist Rebecca Brachman is working late one night alone in the lab when she accidentally sticks herself with a needle full of deadly toxin, and Ali Mustafa finds that the scars of war stay with him even at his new job in the lab.

Documentary filmmaker Caitlin Starowicz is so focused on making her movie about endangered Mountain Gorillas a success that she fails to see what’s in front of her, and for a story on escape rooms, journalist Danny Wicentowski studies the trials, triumphs, and strategies of the players.

Documentary producer Mariah Wilson is days into making her film about the endangered Forest Elephant and still hasn’t seen one, and Science Journalist Katherine J. Wu interviews Mariah Wilson to learn more about the stars of her documentary Silent Forests.

As a child who loves biology and has Caribbean immigrant parents, Calvin Cato feels pressure to become a doctor, and Shane Hanlon can’t help but compare his life choices to those of his hometown best friend.

While working as a camp counsellor at a camp for children with chronic and life-threatening illnesses, Gabe Mollica is determined to keep his promise to one of the campers, and Collette finds herself going along with her mom’s absurd plan to act like her father isn’t dying of cancer.

Dog trainer Chris Brown needs to up his skills when he adopts a former bait dog named Terror, and David Crabb has to make some tough decisions when his dog, Charlie, starts having seizures.

During her first research project in the Sierra Nevada mountains, Katie Moriarty thinks she might have spotted the impossible: a wolverine, and Science Journalist Katherine J. Wu interviews wildlife ecologist Katie Moriarty to find out more about these mystical wolverines.

Ecologist Cylita Guy finds unexpected adventure when she studies bats in the field, and Maija Niemisto is a director of education on the Clearwater, America’s environmental flagship. But when a stranger comes to the side of the ship, it heralds a discovery about her city and herself.