I thought the Mystery of Fligth 447 was an excellent documentary. It's main themes were:

(1) that a smaller storm was blocking the crew from seeing a larger storm. Essentially after travelling through the smaller storm they found themselves in a "point of no return" and had to travel through the larger storm;

(2) that a number of failures occurred over the four minute period, which we know from the messages transmitted to HQ in Paris. One of these messages related to pitot failures, and this was expanded on to suggest that the pitot tubes were iced over, resulting in the aircraft not knowing how fast it was travelling, causing other systems failures;

(3) that at night, in heavy turbulence, the crew would have been overwhelmed with the information provided by the failure messages displayed in the cockpit;

(4) that the aircraft may have stalled once or twice (assuming that the crew had been able to rescue the aircraft from the first stall). The aircraft hit the ocean belly up. It was suggested that the crew may have been in the process of rescuing the aircraft from the first or second stall, and in fact may have come close to saving the aircraft, but ran out of height, and time.

Please feel free to add to my summary.

A very thoughtful and sad documentary.