If the person does not put up the next question within the hour from the time on you post pabzi, then just restart the game, if you want you can give them 24 hrs to get the next question up, which allows them check in.
well if it doesnt include greg i will go with season 1 'blood drops' if it does include greg i think it would be season 2 'chasing the bus' although greg wasnt really a field agent then but he was out there helping