The Scouts move Eren to an old, abandoned castle where his training will continue. Hange visits and reveals that she's been putting two captured Titans through a series of tests and trials--experiments that she wants Eren's help with.
The Scout Regiment moves Eren to an old abandoned castle where he will continue his training. Hanzi visits and reveals that she's been putting two captured Titans through a series of tests and trials - experiments that she wants Eren's help with.—FUNimation