So, Nerve Agent lets you access multiple cards from HQ. When the runner accesses cards normally from HQ he access one card randomly. Does the interplay here mean that he would access one, then choose another randomly (potentially the same card) or does he choose all of the cards to access randomly and then access them one at a time?

Thanks

IsawaSteve said:

Rulebook, page 18: "After the Runner has accessed all required cards, he returns any cards not stolen or trashed to their original play states."

So you access all required cards, one at a time, then return them to the hand. So will never access the same card twice in a single run.