Of the four remaining players, ABC has been hinting the STRONGEST that Paul, Nicole and, yes, Mark is the Mole. Their interests is to throw you off the track.

You people! LOL -I hate "you people." Actually, I think on a marathon rewatch they have been hitting us STRONGEST that Craig and Nicole are the Moles -Mark and Paul we are continually told by others in confessionals that they can't be the Mole. We've been told Craig's intended modus operandi by others if he were to be the Mole -and that would ruin the surprise ending.