Tom Welling has revealed the Smallville episode he refused to film, but Grant Gustin's The Flash series would do it years later in the Arrowverse. With fan-art pieces like this one with Gustin's ...

See Smallville's Tom Welling, Erica Durance reunite for Arrowverse's 'Crisis on Infinite Earths' Erica Durance to reprise Smallville role in Arrowverse's 'Crisis on Infinite Earths' Tom Welling ...