In the next episode of The Flash, the threat to Central City is getting a little bigger as Barry Allen chases down a kaiju-like creature in an episode titled, appropriately, "Monster."
Here's a teaser for the episode:
"Desperate to understand what is happening to her, Caitlin (Danielle Panabaker) visits her mother, Dr. Tannhauser (guest star Susan Walters), a renowned biomedical researcher, in the hopes that her mother can provide some answers about Caitlin’s growing meta-human powers," reads CW's official description of the episode. "However, when Dr. Tannhauser treats her daughter like a test subject, Caitlin grows cold and brings up past wounds causing the two to have a major blowout. Meanwhile, after a mysterious new meta-human attacks Central City, Barry (Grant Gustin) tries to convince Julian (Tom Felton) to let him assist on the case."