The teams dive right in when they're challenged to design and build prosthetics that will propel a swimmer through the water. The swimmer is Lisa Bufano, a dancer and artist who's also a leg and finger amputee.
Using sea creatures for inspiration, the Purple Team's design has umbrellas to look like a jellyfish. Green Team makes prosthetics with flippers and swirling fabric that look like a spiny lion fish.
So whose design will sink or swim? Watch the episode to find out, then share your own designs in the Share section.