Ep 21. The Runaway Dinosaur

Barry Allen, aka The Flash, has been transported to the Speed Force after the events of the previous episode. His friends and family are left trying to figure out how to get him back. Meanwhile, in the Speed Force, Barry is greeted by familiar faces who try to help him understand his situation. As Barry tries to find his way out, he navigates through various memories from his childhood and his time as The Flash.

Back in Central City, Cisco and Caitlin work together to stabilize the breach and bring Barry back. Cisco creates a device that can locate the Speed Force and they use it to pinpoint Barry's location. However, when they attempt to bring him back, something goes awry and they end up bringing back a different version of Barry. This version is confused, has no memory of his past life, and only responds to simple commands. They soon realize that this version of Barry is actually a manifestation of the Speed Force itself.

The team decides to name this new version of Barry "The Runaway Dinosaur" after a children's book that Barry's mother used to read to him as a child. They work to help him regain his memories and understand his powers. Meanwhile, Barry's father Henry returns to Central City and is reunited with his son, albeit in an unexpected form.

As The Runaway Dinosaur starts to understand his abilities, he begins to help the team solve a dangerous meta-human case. It becomes clear that the meta-human has been manipulating reality, causing people to vanish without a trace. The team realizes that the only way to stop this meta-human is to enter his alternate reality and confront him. The Runaway Dinosaur joins the team on this mission and uses his powers to navigate through this alternate reality.

During the confrontation with the meta-human, The Runaway Dinosaur is able to regain some of his memories and starts to become more like Barry. However, the team's success comes at a cost, and they are left dealing with the aftermath of their battle.

Throughout the episode, there are also several emotional moments as Barry's loved ones struggle to come to terms with his absence. Iris, especially, has a touching scene where she reflects on her relationship with Barry and what he means to her.

Overall, The Runaway Dinosaur is an emotional and action-packed episode that delves deeper into Barry's character and the concept of the Speed Force. It showcases the strength of the team and their ability to work together, even in the face of adversity.