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" Grant Gustin stars as DC superhero The Flash in a new promo for the TV series Arrow.      The Glee actor will make his debut as the Scarlet Speedster&amp;#039;s civilian alter-ego, forensics expert Barry Allen, in the next Arrow episode &amp;#039;The Scientist&amp;#039; - airing December 4. Stephen Amell - who plays Oliver Queen on Arrow - previously described Gustin&amp;#039;s take on the character as &amp;quot;a whippersnapper&amp;quot;. &amp;quot;He&amp;#039;s young, he&amp;#039;s enthusiastic,&amp;quot; said Amell. &amp;quot;In fact, he&amp;#039;s incredibly smart [but] he&amp;#039;s a little naive.&amp;quot; After appearing in the following week&amp;#039;s instalment &amp;#039;Three Ghosts&amp;#039; on December 11, the Barry Allen character was intended to feature in a third episode in 2014 which would serve as a backdoor pilot for a Flash spinoff series.  However, executives at The CW have decided to forgo Gustin&amp;#039;s third Arrow stint in favour of giving him his own Flash pilot, after being impressed by the actor&amp;#039;s early work. Arrow&amp;#039;s second season airs on Wednesdays at 8/7c on The CW, and on Mondays at 8pm on Sky1 in the UK. &amp;amp;gt; Stephen Amell on Arrow future: &amp;#039;I hope we&amp;#039;ll see the Justice League&amp;#039; Watch Arrow star Stephen Amell talk season two and DC heroes with Digital Spy below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/arrow/news/a532957/arrow-grant-gustin-plays-the-flash-in-first-look-clip-video/>