"Body Adventure" is the twenty-first episode of Season 2 of Teen Titans Go! and the seventy-third episode overall. It first aired on 13 November 2014 on Cartoon Network.
When Cyborg develops a head cold, Robin thinks it's a good idea to shrink the Titans so they can go inside Cyborg's body to fight the virus.
Cyborg is going over a bad cold, and Robin thinks that it's not an ordinary cold - a virus is inside him! He also thinks it's a "body adventure", a superhero's dream to do. By using a damaged shrink ray, he shrinks himself to go inside Cyborg, but Starfire coughs him out as he was WAY too big to fit Cyborg's mouth, crashing Robin into the shrink ray, destroying it, and now Robin is stuck being tiny.
Loving his life being tiny, Robin eats a topping on Beast Boy's last slice of pizza, steps in Raven's room riding on Silkie, hides with Starfire's dolls in her room, and the still-cold Cyborg, who was getting a sandwich, steps on a cherry tomato that Robin was trying to use as a bowling ball.
Cyborg's cold was getting worse, and the tiny Robin wants a body adventure, but the other Titans suggest they want their old normal-sized leader back, but he refuses, causing him to lose his job as team leader.
While the other Titans give Cyborg a blanket and soup, the tiny Robin returns with the shrink ray he just fixed, to go on a body adventure, but as Cyborg refuses, his whole body is shut down, so Robin decides a body adventure, shrinking the Titans and himself down more to fit in Cyborg's body.
10 months later, the Titans are still far away to the body of Cyborg, but Robin uses the flute to call Silkie. Robin has a lot of fun inside the gross world of Cyborg's body, but the others find it disgusting. Robin prepares to fight a Snot Monster, but he is covered in stinky, gross, ugly, awful germs. He changes his mind about a "body adventure" because he found it gross.
Back in the living room, Cyborg is now starting to die, and the only way to save him is to call 9-1-1. Unfortunately, the 911 operator thinks Raven is pranking her, and she hangs up. Cyborg is now dead, the Titans are now small, and no one is able to help Cyborg.
A time card features Cyborg's dedication, as he lived from 1996 to 2014.
For a full transcript of "Body Adventure", click here.