Zulu is of course on the TV this Christmas, its on right now in fact, Channel 4.
Rorkes Drift is an amazing subject to read about, much more than even the film, which, lets face it, is one of the best films ever made.
John Rouse Merriot Chard VC RE was in command.
From his London Gazette entry
For gallant conduct at the Defence of Rorke’s Drift, 22nd and 23rd January 1879. The Lieutenant-General reports that had it not been for the example and excellent behaviour of Lieutenants Chard, Royal Engineers, and Bromhead, 24th Regiment, the defence of Rorke’s Drift would not have been conducted with the intelligence and tenacity which so eminently characterised it. The Lieutenant-General adds, that the success must in a great measure be attributable to the two young officers who exercised the chief command on the occasion in question.
Read more at the links
This last link has lots of detailed information