It sure looks like we stay in Argentina for all of EP4 and MAYBE, maybe we will leave South America at the start of EP5. But let's see what we have for this episode, and I am afraid once again we have more don't knows than knows:

We start off with all eight remaining teams at the Hacienda outside of Mendoza. It is estimated that the first team of Lynn and Alex arrived at around 3:30PM with the teams of Uchenna and Joyce and Gregg and Brian arriving shortly thereafter. The sun does not set until 8:25PM so everyone still in the game arrived before sunset. That would mean that Alex and Lynn would be starting out at 3:30AM. But we have no scenes of anyone in the dark, so we may be having a good case of bunchup before the sun rises at 6:20AM. It looks like the ROADBLOCK is the first task of the day and from the angle of the shadows and from the fact that the sun is just striking the tops of trees this activity must be starting off just after sunrise. But we do not know if the teams had to go somewhere first to get the clue to go to the horse ranch to do the ROADBLOCK.

There is a shot of Alex and Lynn running down a path through the grass that seems to be the location of the horse ranch. We see Joyce on the horse with Uchenna sitting on a hay bale with the sun just striking a tree behind him. We may also see Lynn or Alex on another hay bale behind Uchenna. The task seems to be to ride the uppity horse through a slalom of barrels to reach a finish line with a rope stretched over it. It looks like the riders may have to grab a ring or something off the rope to complete the task, or the task must be completed in a certain amount of time (like others we have had in the past) we also have a picture of Brian looking out onto the coarse (with Gregg riding, although we do not see him) This is also early looking. Later we have Deana (or Dena, as CBS calls her!) having a good deal of trouble with her horse and the sun is now up pretty high which follows since Ray and Deana left in sixth position. I think that there also is a shot of Kelly on a horse and she is the one who rides under the finish rope. If this is a ROADBLOCK, then the teams of Amber and Rob; Meredith and Gretchen; Susan and Patrick also must start off here but we have seen nothing of them yet.

Next we have a major gap in the story. Somehow the teams move from Mendoza to Buenos Aires. But how? There is train service (slow) and you could drive (slower) or fly. Airlineas Argentinas has flights leaving Mendoza for Buenos Aires at 8:10AM arriving in BA at 9:42AM; 9:50AM arriving at 11:22AM and then not until 2:30PM arriving at 4:02PM and finally a flight leaving at 7:50PM and arriving at 9:22PM (not likely) If the first three teams are starting out shortly after sunrise they should perhaps be able to catch the 8:10AM, but more likely six teams may be able to catch the 9:50AM flight (and maybe all eight!)

We have shots of Deana and Uchenna and Joyce on what looks like a plane with the sun streaming into the windows as it would early in the morning.

Next we have the teams in Buenos Aires, most likely trying to find some landmark to get the next clue. Which I think will tell them to catch the Tren de la Costa (The Coast's Train) from Av. Maidu station North to the city of Tigre. The trains leave every 20 to 30 minutes from 7:30AM until midnight. Tigre is 30KMs north of the city and the trip takes about 25 minutes. We have shot of Rob and Amber on what looks like a train and of Lynn and Alex getting off the train. At the Delta Tigre station they may find their next clue for the DETOUR.

One half of the DETOUR seems to be to go out into the Parana Delta River which covers 14,000 square kms with thousands of islands. They must choose a rubber raft with pilot/guide and then instruct him on where to go to find a shipwreck which matches one in a picture they will have been given. So far we seem to have Rob and Amber; Meredith and Gretchen; Brian and Gregg; Uchenna and Joyce; Ray and Deana all accounted for in the boats. Perhaps also Alex and Lynn (not sure). So that still leaves Susan and Patrick and Ron and Kelly unaccounted for or doing the other task of the DETOUR which we have no clue to what it is.

This seems to take everyone until late in the day to accomplish which probably means that when they find the shipwreck they are given a clue to where the pitstop is.

Finally we have a scene which looks like it is pretty late at night with the El Tigre amusement park lit up in the distance and with Patrick and Susan running towards the camera. Last ones to arrive at the pit stop?

If anyone as more info to be able to fill in the missing blanks, lets have it now.