In which episode did Bittenfeld make a forceful breakthrough?

all of them

All of them. It's surprising that he survived.

It must be somewhere around episode 20-25. I know I watched it very recently, but I can't remember exactly which one.

>>159377151
Pretty sure this was from one of the previews.

>>159377151
He had some real success in the battle of the corridor (like episode ~80), plus there's the battle of marr-adetta with Bucock