'Supergirl': Sam Witwer on how his Agent Liberty-centred episode reveals his origin story

'Supergirl' is all set to reveal the origin story of its steel-masked villain, Agent Liberty. After he was introduced in the first two episodes of season four, the drama will reveal how Ben Lockwood became the terrifying leader he is in Sunday's episode.

Titled as 'Man of Steel,' the episode reveals the formative years of Agent Liberty by revisiting all his past events on the show.

In an interview with Entertainment Weekly Sam Witwer, who plays the role, says, "403 is a risky episode in that it does take the show to a different place. Agent Liberty/Ben Lockwood kind of hijacks the show for an entire episode and the regular cast kind of pop in and out, but it really takes you through the seasons of Supergirl from this guy’s perspective. There was an alien invasion, what was he doing? Where was he?"

Talking about the audience reaction to the forthcoming Agent Liberty-centric episode he continued saying, "I’m crossing my fingers that the audience accepts it because if you turn on Supergirl, you want to see the characters that you know and love. So, they took a big risk and said, 'Well, we’re actually going to pause for a second and take you on a different journey. Then, we’re gonna bring you right back to the show that you love.' Let’s just hope it works."

When asked what viewers and fans can expect from this flashback episode, Witwer reveals that this episode is largely about him. "They kind of do Supergirl but from the perspective of this character Ben Lockwood, who will later become Agent Liberty," he added.

The alien-hating villain then revealed that, "the episode is kind of a retelling of previous notable events in previous seasons but we tell it through his perspective — what was happening to him professionally, what was happening to him personally, what was happening to his family — and really charts the course of taking a good man who believed very strongly in liberty for everyone, including aliens, down this path where life deals him a really bad hand over and over again. It takes you a point where he feels he should put on a mask and incite this Earth first movement," the 'Smallville' star said. 

'Supergirl' airs Sundays at 8 p.m. (7 p.m. CST) on The CW.

Watch the promo to 'Man of Steel' here: