Sam Witwer

Go Behind the Scenes of 'Supergirl' Season 4 (PHOTOS)

'Supergirl's Sam Witwer Joins 'Riverdale' as Jughead's Teacher

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'Supergirl' Newbie Sam Witwer on How Agent Liberty Is 'Protecting Humanity'

Once Upon A Time Premiere: 7 Things We Learned

Once Upon A Time: Hyde Has A Warning (VIDEO)

Once Upon a Time: New Residents Throw Storybrooke Into Emotional Turmoil