The painting in Clarke's holding cell is "Starry Night" by Vincent Van Gogh. The painting was presumably saved along with the rest of the old Earth treasures housed in Mt. Weather.
Currently, there are 46 delinquents dead and 54 alive, not including Bellamy Blake and Raven Reyes.
The title is a reference to the 48 out of the original 100 delinquents inside Mount Weather.
This episode marks the third appearance of a recurring Battlestar Galactica (2004) cast member. Rehka Sharma (Dr. Lorelei Tsing) played Tory Foster from 2006-2009. The other two appearances were Alessandro Juliani (Jacapo Sinclair) and Kate Vernon (Diana Sydney) who played Felix Gaeta and Ellen Tigh, respectively.