When Hank Heywood confronts Ava about the spending habits of the Legends, Nate steps in to try and smooth things over by inviting Hank on to the Waverider. The Legends then show Hank what they do by visiting 1920s Paris, trying to capture the newest Fugitive. Meanwhile, Mona is trying to make a good impression with Ava, but her over eagerness gets her and Ava stuck in a cell instead.
When a solar flare strikes the planet and knocks out communications between and within colonies, the Olympus Town team races against the clock to locate exobiologist/geologist Marta Kamen, who becomes stranded on the surface during a rogue research expedition. Meanwhile, the colony is bracing for its first-ever pregnancy on the Red Planet; tragedy strikes Hana (Jihae); and Amelie’s plans to return to Earth are thwarted. In present day, a scientist and his team on Earth brave harsh and dangerous conditions in the pursuit of data that will help predict the effects of glacial melt on global sea levels.
Dr. Neil Melendez, Dr. Morgan Reznick, and Dr. Claire Brown grapple with a patient's wish to perform an operation that would keep him from acting on his pedophilic urges. Dr. Shaun Murphy learns a lesson in empathy.