The Nazi aliens want to meet with Archer. They give their side of the story in the temporal cold war, and ask for a truce. The Nazi aliens say they’ll get them back to their time period and fix up all the damage they did to earth’s past.

They give Trip and Travis back.

But then for no reason that I can think of, Silik turned himself into Trip before being given back to Enterprise. Silik had already infiltrated the Nazi alien base (which we find out is his target), why would he pose as one of its prisoners?

Archer and Silik team up because they both don’t like Nazi aliens.

The aliens are activating their machine.

Archer also gets some help from the locals.

But Silik dies

Archer finds the real Trip

The Nazi alien is going to go through a portal! He’s kind of taking his sweet time. Soaking in the moment, I guess

Which gives Enterprise enough time to bomb the place

The time line is restored. Archer’s sick of this temporal cold war business. Yeah, we are too.