The Big Setup

The Big Setup is the fourth episode of Angry Birds. and consists of three themes with 15 levels each. This episode's prime focus, and mainly used bird is the Big Brother Bird, whom wants to extract revenge on the pigs for capturing and enslaving the other Birds. During it's journey, the Big Brother Bird frees the Boomerang Birds from captivity, allowing him to assist in the battle for the bird's freedom. Before the player can access this episode, they must first conquer the entirety of Poached Eggs.

The Big Setup includes the ninth, tenth, and eleventh themes, each with 15 levels each. The three themes take the player through previously seen levels from the first seven themes (Poached Eggs, Mighty Hoax, and the first half of Danger Above) which the pigs are attempting to re-construct. As such, many of the pigs wear hard hats, and the levels themselves contain construction sites in the background.

Trivia

 * This is the only episode cutscene with symbols on any of the bird's heads dissappeared
 * This is also the only cutscene with the Green Bird and the Big Brother Bird. (see above)
 * In Angry Birds seasons, pigs wear hard hats in Seasons Greetings as well in The Big Setup.