Yeah that whole chase scene was one of the best I have ever seen on TV. I think you may be right about the two endings,I hope the show gets good enough ratings for us to get the good ending.
Oh and I am rewatching the episodes in order to add chapters to them for my home made blurays and I spotted something in episode five. One of the techs working at the CIA is named Oriana. Why is this interesting? Well in the games Mass Effect 2 and Mass Effect 3 Yvonne Strahovski plays the character Miranda Lawson and she has a "sister/clone" named Oriana. Now we know Coto is a Sci-Fi and there was a military commander in episode one named Shepard(the character the player plays as in the Mass Effect games)and now in episode five there is an Oriana. This has to be a fun little nod to Mass Effect if you ask me:)