In this episode, we go inside the extraordinary bodies of dwarfs to unlock the secrets of their unique designs. We meet the Campbell family, who all have different forms of dwarfism, and Danny White – a dwarf whose syndrome is responsible for making some of the smallest people on the planet.

In this episode we journey inside the extraordinary bodies of conjoined twins. We meet Lori and Reba, sisters who share a third of their brain, but maintain completely separate mental function, including polar-opposite personalities. We also meet Shawna and Janelle, born connected from the chest to the stomach, with fused livers. Where does one person end and the other begin when they share their inner workings?

From over-active pituitary glands that spew growth hormone to mutations in a single gene, we investigate the bio-mechanisms that have caused gigantism. We meet Igor, who owes his 7’ 8” stature to a benign tumour on his pituitary gland. And we meet Sandy, the tallest living woman in the world. At 7’ 7 ¼”, Sandy is an acromegalic giantess, whose has 100 times the growth hormone of an average person, which has sculpted her body in distinct and often painful ways.

In this episode we meet people living with morbid obesity. Francis is hoping surgery can save him from his runaway appetite, now that he's ballooned to over 500lb. Kate’s staggering obesity was caused by Cushing's Syndrome, a rare condition that causes people to pile on pounds without over-eating. Plus, we meet two men who actually work at gaining weight – sumo wrestlers.