If a Cylon leader is infiltrating and still on New Caprica when Galactica jumps away, do they count as a "human character left on New Caprica", thus triggering their execution? This could be relevant for the agenda cards: Join the Colonials and Show Their True Nature.
Pegasus rulebook, pg 7:
I don't see an exception for infiltrating cylons on pg 17:
Therefore, infiltrating cylons are humans and would be executed.