Ghost of a Chance is the third episode of the first season of Avengers Assemble and the third of the overall series. It aired July 7th, 2013.
The rookie Falcon stands alone to save his team and stop a full scale invasion of Earth after the Avengers fall victim to the body-swapping Space Phantoms.
The episode opens with Falcon flying through the city while carrying a box. Iron Man shows up and pesters him about the box's contents. When Falcon refuses to tell him, Iron Man repeatedly takes and drops the box to watch Falcon dive to retrieve it each time. When they land, Falcon admits to being nervous about his first official day as an Avenger and is afraid he'll be late. After walking into the Avengers' meeting he opens the box to reveal cookies baked by his mother. The rest of the Avengers, minus Hawkeye, Iron Man and Captain America, fight over the cookies. Iron Man and Falcon run into Hawkeye who questions Falcon's identity. Iron Man assumes he's in a bad mood, but the real Hawkeye is trapped in the wall like a ghost. Thor is the next victim of being replaced by ghost-like creatures and trapped in a portal to their world. During a sparring match with Falcon, Captain America faces the same ghostly fate and attacks him. Falcon realizes something's wrong and goes to find out what. Soon, he and Iron Man are the only ones left to fend off these copies of their teammates and investigate how they got there. Eventually Iron Man falls victim to them as well and it's all up to Falcon. These ghosts came to get rid of the Avengers since they were the biggest threat in Earth's dimension. Their goal is to free their "brethren" from the portal now being guarded by the fallen Avengers. Falcon tries to destroy the portal, but is warned by his enemy that he will trap his friends in their new prison. Meanwhile, the Avengers take to destroying these creatures and keep them from getting through the portal once the fake Hulk breaks through from the other side. After being seemingly defeated, Hawkeye creates a vortex that sends the false Avengers into the middle of the battle on the other side of the portal. They and the rest of their kind are defeated and the portal destroyed.