One hundred years ago, the heirs of the Halle-based industrialist Carl Adolph Riebeck began exploiting the coal reserves

Today marks ten years since I lost my mom, Beverly. It’s strange how a decade can feel both like a lifetime and like no time at all. I still remember the weight of her hand in mine during those final days

Source I guess the cat was out of the bag after episode 4, after finally the american spy has been identify but who is / was working with her was not clear and thats what this episodes does, with Irina