So, season 4 introduced the Bionic Academy, and Adam, Bree and Chase as the mentors. In this little series thingy, I'll write about the key episodes that I had in mind for season 4. Not the filler episodes, the main episodes that drive the storyline forward, leading to the season/series finale. So, without further ado (that's fun to say by the way), let's begin with the return of a certain character.

[PS: I know I tend never to finish my fan fictions. I don't know why. But this one I want to finish. Rest assured I know exactly how the story will end, so there's that. )

The Return

So, first thing you need to know: Marcus returns. Except not the Marcus we know. The android Marcus was based on a real boy. Before Adam, Bree and Chase, a young Marcus had run away from home and found Douglas. He was weak and his family hated him and he needed something in his life that had meaning. So Douglas started research into bionics. And when he thought he was ready, he gave them to Marcus. But he was wrong. The bionics weren't ready. And he went into a comatose state for years. Douglas based the android on him.

In season 4, he returns. Trying to destroy the academy. He reveals that he woke up soon after the android Marcus died. Afraid of his bionics and terrified being in a new time, he learnt to control his bionics, which are more powerful than any of the Lab Rats' put together. And he nearly destroys them. He tries to kill Douglas too, blaming him for everything bad that ever happened to him. And he goes mad, and glitches like crazy, causing this scene:

DOUGLAS: No. No no no. I wish I had perfected the bionics sooner. I wish you didn't have to go into a coma. But look at the good you've done. Without you, none of this would have been possible. I know you're not listening, and you have every right not to, but you were always my first son.

(To the Lab Rats)

DOUGLAS (CONT'D): The Triton app wasn't originally for evil purposes. I… Created it so I could control your bionics in case anything went wrong… So what happened to Marcus wouldn't happen to you.

(To Marcus)

DOUGLAS (CONT'D): And while you were in your coma, I gave it to you too. I don't want you to die. Forgive me. But this is the only way to protect you.

Douglas uses the Triton App on Marcus to once again send Marcus into his coma. And then he doesn't properly appear for a few episodes. Until "Forbidden Hero". I know, I know. It's supposed to be the next episode (unless you're reading this after it's aired), but in this fanon, it comes a few episodes after the first Marcus episode, and it's a one-hour special.