This film is classic Chang Cheh stuff here. Once again, another successful David Chiang/Ti Lung collaboration. Ti Lung and his men must rescue a prince but are opposed by Ku Feng, Chen Sing, the 5 great fighters (consisting of the 5 elements) and their army. Upon finding out where the prince is being held, they must find a light skills expert in order to cross a booby-trapped bridge which must be crossed in order to reach the prince. Enter David Chiang (well, sort of). David ends up linking up with Ti and his men to get to the prince.

This film is pretty action-packed and bloody for an early 70s film. Ti really delivers a great performance as a man driven by chivalry and honor. David also does quite well in taking up the same cause. Ku Feng once again secures his place as one of, if not, the best character actors the genre has ever since. The 5 element factor is quite interesting as Chang Cheh uses this aspect later in his career with 5 Element Ninjas. Deadly Duo is a definite must see for the serious or casual kung fu fan!