Arrow is revealing the first look at comedian Echo Kellum as DC Comics hero Mr Terrific.
Kellum's openly gay version of the superhero goes under his civilian identity Curtis Holt, as Felicity Smoak's right-hand-man at Palmer Technologies.
Producer Marc Guggenheim predicted to TV Insider that Kellum will surely become a fan favourite in season four.
"Echo has quickly become an MVP of the cast," the producer boasted. "I think a lot of people will compare him favorably to the addition of [Felicity] in season one. He has this wonderful energy."
Mr Terrific was introduced into the pages of DC Comics 1997 as a hero possessing Olympic-level athleticism and a genius intellect.
Over the last 18 years, the character has been a key member of both the Justice Society of America and black ops group Checkmate.
Mr Terrific joins Baron Blitzkrieg, Anarky, Lady Cop, Vandal Savage and Hawkman as DC favourites introduced in Arrow this year.
Arrow returns to US screens on Wednesday, October 7 on The CW. Sky1 airs the series in the UK.
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