We have to hurry.

Come on! We have to hurry. We're running out of time. / Быстрее! Мы дожны торопиться. У нас нет времени.

We have to put a stop to this.

People should know.

People should know. How you saved us all. Thye should know what a hero you are. / Люди должны знать. Как вы нас всех спасли. Они должны знать какой вы герой.

How many times do we have to go through this?

We have to stop them.

We have to get down there.

We've got to help him.