She's great on Hannibal.

She's not on it lol

You're confusing her with Gillian Anderson who is almost twice her age. I guess that's a great compliment to Anderson, but doesn't say much about your ability to check facts.

Her powers of invisibility on the show are nothing short of miraculous!

You're confusing her with Gillian Anderson

Actually, I think the OP was thinking of Caroline Dhavernas who plays Dr Bloom. (who IMO could pass as a sister of Miss Brosnahan).

I could be wrong though, I've recorded but have yet watched the most recent season.