Reverb, we hardly knew you, but Cisco's Earth-2 doppelgänger proves to be very, very useful in this new clip from The Flash

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The preview of Tuesday's episode, "Versus Zoom," shows Barry Allen come to a huge revelation about Reverb's metahuman ability, and thus Cisco's as well. Could Cisco be the key to controlling the Multiverse? That sure seems to be the case.The synopsis for "Versus Zoom" reads: "Equipped with the tachyon device, Barry believes he is fast enough to stop Zoom and wants to open the breaches to catch him. Harry strongly advises against that plan but after Barry convinces him, Harry reveals that Cisco has the power to re-open the breach. Meanwhile, Hunter Zoloman's painful story on Earth-2 is revealed."The Flash airs Tuesdays at 8 p.m. ET/PT on The CW.