I stand corrected.
8201, 8203, and 8209 (late Fri/Sun only) southbound and 8202, 8208, and 8204 (late Frii/Sun only) northbound are Martz only.
Latest schedule to from Allentown/ Wilkes Barre/ Scranton: https://martztrailways.com/wp-content/uploads/2018/07/MartzSmallDay073018.pdf
The other...