As mentioned by the previous reviewer 'vampirejesus'; So called experts and various distant relatives of those on board give their opinions on what happened and how their relatives behaved etc. The continuous replays of computer generated scenes became somewhat tedious to the point of becoming totally irrelevent. The mention of a possible coal bunker fire, which whilst being quite relevent, came up as only speculation with no real proof being provided.
But what really irritated me was the machine-gun type commentary of an 'expert' by the name of Kaylee Jukich-Fish (sp) whose appallingly rapid speech became so irritating after a while that every time she came on I hit the mute button!!
A serious documentary? Definitely NOT! Infotainment only, and then at the lowest level possible.