There wasd a big hint that Helena is the one downstairs in the first ep of S2 when she reached to turn on her computer and fumbled looking for the power button
I was reading a review and the reviewer also pointed out that an innie would never describe an apartment as boring, that they would be super fascinated by it
Right, I figure the evidence is stronger than not that it's Helena but I'm wondering if that's the point if they're making us think she's going in as the mole or if there's something else to it. I don't know why the show would make a point to continue to be ambiguous about it after all this set up unless they think they can still salvage a surprising twist for those that aren't cueing into context clues. Though, on the same hand the big twist with Ms. Casey/Gemma being alive was revealed before Mark's cliffhanger yell "She's Alive!" and the point wasn't the twist itself but how innie Mark reacted to it. So I suppose the same thing can apply here. At some point the other MDR gents will snuff out the difference between Helena and Helly and it will create a big dramatic wrinkle.