Hi Sidari, it was on Channel 4 last Tuesday, and called "Terror at Sea: The Sinking of the Concordia"
With a title like that we gave the program little chance of being any good, but as there was nothing else on we gave it a try.
In case it's not shown again, or anyone else it interested, it is on the Channel 4 video archive at Terror at Sea: The Sinking of the Concordia - 4oD - Channel 4
Last: Cunard Queen Victoria January 2016
Next: Oceania Marina June 2016
Then: P&O Oriana August 2016
Then: P&O Oceana December 2016
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Adonia(4+2), Arcadia, Artemis(2), Aurora(5), Azura(2), Britannia, Oceana(3), Oriana(12), Ventura(2), Victoria(5)
QM2(2), QE2(9), QV(7), QE, Caronia(2), Minerva, Minerva II, Fred.Olsen(8), NCL Jade, =X= Eclipse, HAL Ryndam, Aza.Journey