Season 2: Recipe for Disaster

The babbling prisoner (who does have scientific knowledge
and is posing as Barnes’ victim) warns JT that Dr. Barnes will notice if he
fakes something and he wants the serum to combine it with Vincent’s blood to
make Beasts. At that point  I theorized
that the JT’s mysterious cellmate (Tom Everett Scott) is probably our big bad
luring JT into a false sense of security.