Stretch Armstrong and the Flex Fighters is an American animated television series produced by Hasbro Studios and distributed by Netflix.

Jake Armstrong, Nathan Park, and Ricardo Perez were three ordinary teenagers living in the technological hub Charter City until they were doused in a substance known as "Flexarium" during an accident.

Rook offers them their freedom from the authorities over the accident in exchange for enlisting the trio as Charter City's superhero team known as the Flex Fighters.

Agreeing on the terms that Rook and everyone else won't know their real identities, Jake becomes Stretch, Nathan becomes Wingspan, and Ricardo becomes Omni-Mass.

In their first days as superheroes, the Flex Fighters receive hard training from Malcolm Kane (Rook's second-in-command) while fighting against numerous villains including Stretch Monster, who benefices many of them, and also shared a past with Dr. Racine Cleo / Dr. C (Rook's former mentor) and her ninja companion Riya Dashti / Blindstrike (Stretch's classmate and love interest).

In their last mission, the Flex Fighters discover in horror that Jonathan Rook and Stretch Monster are the same person and therefore, he has been their enemy the whole time.

[7] Branded fugitives by Jonathan Rook, Jake, Nathan and Ricardo become Stretch, Wingspan and Omni-Mass once more when Dr. Don Robertson/ Multi-Farious rampages the city.

Meanwhile, Blindstrike (recently revealed to be Riya Dashti, Jake's crush) incapacitates the Flex Fighters with smoke bombs and leaves them in the tunnels before pursuing the Freak Sisters as they attempt to stage a bank robbery.

After witnessing Blindstrike trap them in an energy cage, Stretch interrogates Kari and Mari Freak after Omni-Mass tries to seduce them and fails.

After Blindstrike scans the chips on their necks, Dr. C receives the data and begins construction on a control device to round up Circuit-Stream and Quick Charge.

Emily Ashby of Common Sense Media described the series as a "fan superhero tale" with cartoon violence in each episode, but emphasis on teamwork as a theme.