The scene where Clark takes Kara to the railroad in super speed is from "Ryan"

[Mr. Clark Kent27]

It was backwards though, they just added some blue in it. It was a shot used again from "Ryan", season 2. The Fortress shot was just darkend to look like it was in the night time. It was the same shot from Arrival.

[Minela]

Really? I didn't notice. Oh, well I dont mind. Gotta save some green.

[Routh]

I think the scene where Clark and Kara ram into each other (the teaser) is from Talisman (the Clark/Jeremiah fight). :\