Ep 15. In Deep

The Avengers are back and this time they are heading deep into the ocean for their latest mission. In episode 15 of season 1 of Marvel's Avengers Assemble titled 'In Deep', the team finds themselves in an underwater base along with Attuma, one of their most dangerous foes.

The episode starts off with Captain America, Iron Man, Thor, and Falcon responding to a distress signal coming from an underwater lab. The team heads out to investigate and soon finds out that Attuma is behind the attack. The villain has taken over the lab and is using it to launch an assault on the surface world.

The Avengers quickly come up with a plan to infiltrate the lab and stop Attuma. The team splits up with Captain America and Thor heading inside the lab while Iron Man and Falcon stay outside to take care of any attackers that may come their way. The inside of the lab is heavily guarded and the team has to fight their way through to get to Attuma.

As they make their way through the lab, Captain America and Thor come across a group of Atlanteans who are being held captive by Attuma. The two heroes quickly free the hostages and turn them against their captors. This diversion allows the Avengers to make their way to Attuma's command center.

Inside the command center, the team discovers that Attuma is planning to launch an underwater missile at the surface world. The Avengers have to act quickly to stop the missile launch and take down Attuma. However, the villain has a few tricks up his sleeve and causes the lab to start flooding.

The Avengers have to fight off Attuma's minions while trying to prevent the lab from completely flooding. Iron Man comes up with a plan to use his suit's power to create an air bubble around the team, allowing them to breathe even as the water level rises. The team manages to stop the missile launch and defeat Attuma before escaping the lab just as it completely fills up with water.

The episode ends with the Avengers regrouping on the surface and Thor saying that they may have defeated Attuma, but they still have to face the many other enemies that are out there. The team agrees and prepares to face whatever challenges may come their way.

Overall, episode 15 of Marvel's Avengers Assemble is a thrilling ride from start to finish. With non-stop action and plenty of suspense, this episode is a must-watch for any fan of the show. With Attuma already making an appearance, viewers can be sure that more villains from the Marvel universe will be making their way onto the show in the future.