In the next episode of "The Flash," Iris West (Candice Patton) and her friends go to her bachelorette party and have an unexpected encounter with a mysterious individual.

The trailer for the upcoming installment titled "Girls Night Out" was just recently released and showed Iris together with Caitlin Snow (Danielle Panabaker), Felicity Smoak (Emily Bett Rickards), and Cecile Horton (Danielle Nicolet) spending her bachelorette party at a bar. A man approaches their table as Iris asks them whether they ordered a stripper. The man suddenly drops his eye in a glass of champagne which startles the group. Smaok then says in surprise, "I meant take off your pants, not your eye." Snow then overturns their table and a fight ensues. Iris hits the strange man with her bag as he plunges to the ground.

Meanwhile, Barry Allen (Grant Gustin) together with Cisco Ramon (Carlos Valdes), Dr. Harry Wells (Tom Cavanagh), and Joe West (Jesse L. Martin) are at his bachelor party at a strip club. However, Allen does not seem to be holding it together very well. He appears to be drunk as he slurs his speech and moves in an awkward manner. It remains to be seen who the mysterious man is at Iris's party and if Allen will be able to get home in one piece.

In the previous episode, Allen and the team encountered Ralph Dibny a.k.a. Elongated Man (Hartley Sawyer). Dibny was once a crooked cop but after getting a tough talk from Allen, he decided to change his ways and look out for others instead of himself. Allen invited the Elongated Man to work with him at Star Labs and catch the bad guys. Dibny accepted his offer with much enthusiasm.

"The Flash" season 4 episode 5 will air on Tuesday, Nov. 7 at 8 p.m. EDT on The CW.