Agents of SHIELD is a decent show. Each season has its unique flavour, its own atmosphere. But there were no obvious mistakes.
This episode in paricular has a nice structure, good drama and action scenes.
To be honest the "Russian" episode from season 1 I was watching in Russian dub, so I cannot critisize it. Yet this one I can.
And God! So many mistakes that make me feel beyond cringe. That is just bad.
Bobbie supose to infiltare the facility and judge others for being bad agents as they do not speak foeign languages. Case in study - Russian. And when she is there, talking to Russians, her pronounciation is pure gibberish. Then Russian characters that speak English between each other. That is just nonsence as earlier we see guards that talk fine Russian.
And my absolute favourite is the computer keybord. That is the object from Hell. Producers, assistants, director! Where have you been? You couldn´t find Russian consultant, at least find in google how the Russian keybourd looks like. We do not translate "Enter" we leave it as it is. and Ctrl also. What is shown in the movie reads as Tstrl. and finally Shift. I woul put in cyrilics here, but the IMDB does not let me...
Well, my point is that from language perspective the episode is absolute mess and ruins the mood. Next time find some Russian person to help you!