Over 30 years since its release, this is still the high watermark of the series and, indeed pretty much any adventure film. Ford is the lynchpin of the series, and unlike James Bond, it is difficult to imagine anyone else taking on this role in the future. What makes Indiana Jones works so well as a character and instantly connect with an audience (apart from being Han Solo in disguise) is his world-weariness and that he does indeed seem to be "making it up as he goes along." He makes mistakes and gets himself into trouble more often than not. The sheer pace, the reliance on practical stunts and Ford's performance here sets this film apart from some of the more ridiculous elements that mar the sequels and Karen Allen is a great foil. Every film of course has a great score from Williams, but the theme created for the Ark of the Covenant elevates the music to another level. But it is Ford that embodies Indiana Jones - the looks of relief, panic and determination that cross his face, sometimes all in one shot, is often priceless and he is the key to making this character work so well.