is attack on titan (shingeki no kyojin) episode 70 filler?

In their cell, Gabi Braun feigns illness so Falco Grice's shouts of concern are able to draw in a Garrison guard to look at her. When the guard approaches, Gabi suddenly attacks him, beating his head with a cloth-wrapped brick.

Falco expresses doubts about their escape, but Gabi believes that staying will result in them being killed. In Marley, Reiner Braun awakens in a hospital with Pieck Finger and Porco Galliard by his bed.

He asks where Gabi and Falco are. After running all night, Gabi and Falco take a break by a river.