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Promotional photo of CW's "The Flash."

In the next episode of "The Flash," The Flash a.k.a. Barry Allen (Grant Gustin) trains Ralph Dibny a.k.a. Elongated Man (Hartley Sawyer) to be his sidekick and fight crime.

The trailer for the upcoming installment titled "When Harry Met Harry" was just recently released and showed Allen training his new sidekick Dibny on the field where they encounter a mugger. "This is perfect. Muggers... not like Superhero 101," the speedster says to the elastic metahuman. All of a sudden, the mugger shoots Dibny in the chest but the bullet gets absorbed by his rubbery body and bounces back at the criminal who gets hit in the leg. "Well, our work here is done," Elongated Man says is surprise. Back at Star Labs, Allen tells Dibny to suit up for their first mission. The neophyte superhero appears to be very excited to wear his new super suit.

Technical genius Cisco Ramon (Carlos Valdes) briefs Dibny about his new costume. Apparently, when the he stretches, the suit will extend as well. "When you stretch, it stretches. When you squish, it squishes," Ramon informs Elongated Man of his light purple special uniform. Later, Flash and his sidekick go to a museum to investigate a metahuman. However, they are suddenly chased by a skeletal dinosaur that roars at them. Dibny is thrown against the wall which gets smashed by his force. It remains to be seen if they will be able to defeat the metahuman enemy.

In the last episode, Iris West's (Candice Patton) bachelorette party was cut short when Norvok (Mark Sweatman) crashed their table and fought with West and the rest of the girls. Nevertheless, the females were able to stop Norvok and his boss Amunet (Katee Sackhoff) from proceeding with their shady plans.

"The Flash" season 4 episode 6 will air on Tuesday, Nov. 14 at 9 p.m. EST on The CW.