Its going to be a full-on identity crisis,Charles Vandervaart, who plays William, tellsGlamour.

He discovers thats all a lie.

Everything he was raised with isnt hishis ideas about his identity are gone.

Outlander William Ransom Charles Vandervaart redcoat hat

Robert Wilson/Starz

I dont think this is a very pretty season for Mr. William Ransom, he says.

Hopefully, theres a lot of growing to do.

In fact, Vandervaart says its his favorite episode of the season.

Caitriona Balfe Charles Vandervaart Outlander Claire William

Claire and William, before the big reveal.

Williams just an absolute tornado, and I cant wait for people to see that.

So what does this mean for Williams relationship with Jamie, Claire, and Lord John going forward?

And what was it like to finally play a reveal that was in the works for years?

Below, Vandervaart tells all.

Claire and William, before the big reveal.

Glamour:Last weeks episode was monumental for William.

Where does he go from here?

Charles Vandervaart:Just after the discovery of his true parentage, well see him absolutely lose it.

I dont want to give away too much, but he throws a tantrum.

And even if you do want to have a full-blown tantrum, you cant quite do that.

You have to hold yourself in.

But William does not do that.

Hes not about to hold it back.

He pretty much lost it at the end of episode 711.

What was it like to play the moment where William overhears that hes Jamie’s son?

Even then, William doesnt know that Jamies his real dad.

So its the final meeting between these men, and its been a long time coming.

At the end of last weeks episode, William handed Jamie something.

It goes really well.

He doesnt lose his arm.

He thought he was going to lose his arm, and he doesnt.

I think in that moment William realizes that Ians uncle is in fact Jamie Fraser.

For moreOutlandercast interviews from this season, you could read thosehere.