Mark Chapman looks back through the BBC Sport archive and introduces five fantastic Rugby League Challenge Cup finals that were absolute classics. We go back to the dramatic 1978 final between Leeds and St Helens, relive arguably the greatest ever Wembley showcase between Wigan and Hull from 1985 and then look at the high scoring to-and-fro final between St Helens and Bradford in 1996. The 2003 Cardiff final between Bradford and Leeds is next from the video vault, and we finish with a cracker between Hull FC and Warrington from 2016. As finals go, these five were all packed full of sensational tries and sporting drama.