I'm on the Bliss departing MIA for LAX via the Panama Canal Dec 4, and the shows are "Jersey Boys" and "Six." They're reportedly about 75 minutes in length, and a couple of places on the web state that show times are 730pm and approximately 1030pm. (https://eatsleepcruise.com/norwegian-bliss-entertainment-guide/)
I'm in a Club Balcony BB cabin, so I got to book specialty dining reservations 121 days out, but reservations for the shows are 21 days out, according to one of the chat assistants on the NCL website.
Hope we both enjoy the trip! It's my first time transiting the canal, and my 4th NCL ship (did Celebrity 3 times in the past year and they were fantastic). Also tried Carnival for my first cruise, just to see if I liked the experience generally, MSC and Royal Caribbean.