At the end of the previous episode, after Felicity is informed that her Team Arrow connections make her a Helix liability, Alena (a.k.a. Kojo Sledgehammer) presented her new BFF with a going away gift: Cayden James' biometric tracker. So now that she can't hang out with Helix, Felicity heads back to the ArrowCave to put the biometric tracker to use, finding the whereabouts of Adrian Chase/Prometheus. Of course, her and Oliver have to have a drama-filled conversation while device searches for Chase's heartbeat. When it receives a hit, Felicity and Oliver are stunned when it tracks Chase to their exact location. Ka-BOOM!
The explosion in the bunker sends Oliver and Felicity flying; however, it wasn't a typical explosion. It was an EMP. How do we know? "Because the spinal implant that helps me walk isn't working," Felicity says in the trailer. "I can't feel my legs."
Things get intense when Oliver (Stephen Amell) and Felicity (Emily Bett Rickards) are trapped in the bunker together. Meanwhile, Lyla (guest star Audrey Marie Andreson) and Diggle (David Ramsey) deal with their martial issues.
Wendey Stanzler directed the episode written by Wendy Mericle & Beth Schwartz.
Check "Underneath" preview images in our gallery below.
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Based on the characters from DC, ARROW is from Bonanza Productions Inc. in association with Berlanti Productions and Warner Bros. Television, with executive producers Greg Berlanti (The Flash, Supergirl), Marc Guggenheim (Eli Stone, Percy Jackson: Sea of Monsters), Andrew Kreisberg (The Flash, Supergirl), Wendy Mericle (Desperate Housewives, Eli Stone) and Sarah Schechter (Supergirl, Blindspot).
Arrow airs Wednesday nights at 9 p.m. ET/PT on The CW Television Network. "Underneath" will premiere on May 3.