I think it is a very clever mechanic, as up till now you (think) you know who are the human players and who are hosts, but after the latest episode anyone and everyone inc Ford could potentially be a host. I think Theresa was under orders to get the data out of the park anyway she could without Ford knowing/noticing but as he seems to be at least 3 plays ahead of everyone he knew it was going to happen or had even planned for it ahead of time, the Host being made in the lab seems to point to that. How many people has Ford potentially replaced with hosts ? And has he used Bernard every time or does he have a number of "sleeper agents" available to him.