Sink or Swim is the fifth episode of Angry Birds Toons Season 2 and the fifty-seventh overall.
It's about time for Red to learn how to swim, but he's too stubborn to accept help from his friends! Can he overcome his pride and channel his inner waterfowl?
At the beach, the birds are having fun swimming, except Red. Despite their requests, he won't join them, so the Blues push him in, but when he starts floating, he sinks. So Chuck and Bomb come to the rescue. When pushed back onshore, Red decides to leave. Now determined to learn how to swim, he starts with a life-ring. It starts off well, but the others arrive and Bomb decides to dive-bomb into the water. This left Red submerged, with a fish laughing at him. Later, he tries again with a snorkel, but accidentally fills himself up with water in the process, sending him underwater again, with a crab using him as a trampoline. Yet again, he tries again, with an air-tank and a flipper. He trips on the flipper, and a fish takes a photo of him.
Now convinced he can't swim, Red walks off, but notices that the eggs are missing. He spots them floating across the water, but it turns out the Pigs had stolen them. Now enraged, he miraculously swims across the ocean, beat the pigs up and gets the eggs back. With the birds celebrating, Red jumps back into the ocean, and sinks again, now finding out that he's now a local celebrity with the fish.
A gag in the episode is when Red sinks to the bottom of the ocean, the fish laugh at him.
Unusually, Red is seen swimming in Egg's Day Out, while in this episode, he doesn't know how to. A few possible theories are is that either this episode takes place before Egg's Day Out, Red only swims in dire circumstances; Such as the loss of the eggs, or that the waterfall and the lake Red is seen swimming in the aforementioned episode is shallow.