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:
A Cylon Leader is considered a “human player” when he is Infiltrating and a “Cylon player” when he is not Infiltrating.
I don't see an exception for infiltrating cylons on pg 17:
Once the Admiral has ordered Galactica to leave and ended the game, destroy all civilian ships still on New Caprica, and execute any human players still on a New Caprica location. If after resolving those losses, no resource has been reduced to 0 or lower, the humans win the game!
Therefore, infiltrating cylons are humans and would be executed.