Grant Gustin's The Flash ended up doing the Smallville episode Tom Welling said he would not show up on set if filmed, and the Arrowverse handled it better than the Superman prequel series could have.
ScreenRant on MSN
One Of Grant Gustin’s Best Moments As The Flash Came From The Arrowverse’s Take On The Smallville Episode Tom Welling Refused To Film
Grant Gustin's The Flash ended up making the Smallville episode series star Tom Welling was not game to do, and it led to one of the best moments of the Arrowverse's most popular show. When it comes ...
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