Found the episode in question after doing some digging - S1E10 Blood Money
West lobby, elevators on the right
Exterior glass entry pavilion
You can find the series on Tubi for free - the shot taken in the lobby is around 12:55 in
https://archives.yale.edu/repositories/5/archival_objects/3476719 More shots of the Pru throughout its history - buggy website however, so be wary of the frequent 403 Forbidden error
Those old retail design showcase books from the 80s to 90s always have a fair share of old, forgotten photos. I’ve seen that some of them have some old shots from Copley and Prudential