Ep 5. Monster

Barry and the team are dealing with the aftermath of the previous episode, where Barry accidentally created a new timeline by saving his mother's life. As they struggle to adjust to this new reality, they are faced with a new villain named "The Rival", who has gained speedster powers and is wreaking havoc in Central City.

Meanwhile, Caitlin is dealing with her own personal struggles as her powers continue to grow and she fears becoming like her Earth-2 counterpart Killer Frost. She seeks out the help of her mother, a renowned scientist, to try and find a cure for her powers.

As The Rival continues to terrorize the city, Barry begins to realize that his actions in creating the new timeline may have also created other unexpected consequences. One of these consequences is the appearance of a "monster" in Central City, made up of the DNA of multiple people. The team must work together to find a way to stop The Rival and the monster before they cause irreversible damage.

Barry also begins to question whether he made the right decision in saving his mother's life and altering the timeline. He confides in Iris and seeks advice from Jay Garrick, the Flash from Earth-3, who has also had experience with altering timelines.

Throughout the episode, the team faces various challenges and obstacles in their pursuit of stopping The Rival and the monster. Along the way, they receive unexpected help from an old foe.

As the episode comes to a close, Barry and the team come up with a plan to defeat The Rival and the monster, but not without consequences. The team must once again face the repercussions of Barry's actions and learn to navigate this new reality.

Overall, "Monster" is an action-packed episode with plenty of twists and turns, as well as emotional moments for the characters. It highlights the importance of teamwork and the consequences of messing with time.