Harrison Ford was the perfect man.
See also: Working Girl, Raiders of the Lost Arc, The Fugitive
Oh, and Witness is one of the most perfectly constructed romance/thrillers ever. Weir gives Ford/Mcgillis' relationship plenty of time to flourish while murder and conspiracy hangs above them like the sword of Damocles. Few images in the cinema are as haunting as the three gunmen marching steadily towards the serenity of the Amish homestead. Only a dated score and a couple overwrought montage sequences hold it back upon contemporary viewing.