About 25 minutes into this episode, after Howard asks for a tranquilizer, he looks at list of names of the orchestra players. They show viewer the list in his hand, and then it cuts to shot of Howard reading list. Then they show a close-up of a name on the list and Howard says it aloud, "Jennifer Wilcox", which is listed under the instrument "KLARINETTEN". If you go back to first showing of the list you see the name where Jennifer Wilcox should be says Lisa Adler, and Jennifer Wilcox is listed under a different instrument, "BRATCHEN", on the left.
When the two Howards are talking at the rehearsal, Howard Prime explains that Baldwin and Nadia shared a past for 10 years before the divergence, which was 30 years ago. That would make Nadia/Baldwin about 40 years old, which seems incorrect for this nimble, youthful assassin. (The actress is 27.)