Thomas (Dylan O’Brien), the young protagonist of the post-apocalyptic teen action films “The Maze Runner” and “Maze Runner: The Scorch Trials” has a pathological aversion to systems of control.

He and his friends discover that they have been subjects in experimental trials at the hands of WCKD, the World Catastrophe Kill Zone Department.

This was established in “The Maze Runner,” and in “Scorch Trials,” director Wes Ball puts the pedal to the floor in terms of thematics, scope and bombast — everything is faster, bigger and scarier. Thomas, we’re definitely not in the Glade anymore.

Where he finds himself, along with his pals who escaped with him, is in a helicopter touching down in a vast desert, picking up almost exactly where the first film left off, with a quick dream sequence to fill in the backstory.

Taken to a warehouse medical facility, the teens are assured they are safe from WCKD, but Thomas is not buying it, especially coming from the mouth of the world’s pre-eminent smooth-talking slimeball, Mr. Janssen (Aidan Gillen).

Like a caged rat, Thomas has a preternatural tendency to and ability for escape, and he quickly breaks the crew out into the wasteland of The Scorch, all sand dunes and crumbling cities.

Free of the titular maze, “Scorch Trials” is able to do every action sequence on a larger scale, but it still feels like relentless running in circles. When Thomas sighs he’s tired of running, we’re tired, too.

Unlike other post-apocalyptic young adult properties like “The Hunger Games” and “Divergent,” “Maze Runner” is grittier, dirtier, sweatier. Freed of the cold, austere spaces and bunkers that mark those films, out in a “Mad Max” type world, it feels somewhat real.

There are ridiculous and unnecessary monsters, but the stakes are straightforward — Thomas wants him and his friends to be free.

O’Brien is so fully, physically committed you can’t help but believe in him, and he’s surrounded by a winning supporting cast of young actors — Ki Hong Lee, Thomas Brodie-Sangster, Kaya Scodelario, Jacob Lofland, Dexter Darden — that are a pleasure to watch.

Wrestling with ideas about science, liberty and the greater good, “Scorch Trials,” puts these issues at the forefront. When an older generation insists on feeding off the new, what responsibility does the new generation have toward building a better world or saving the old one?

It’s not anything groundbreaking in the young adult genre, but these films make the questions tangibly teenage and an absolute blast to watch.