Harley-Davidson Duo Glide Episode: 2
Maybe a Harley made up to look like something else?? I don't know what though.
H-D Duo-Glide, the pillion seat belongs on something Wehrmacht or Soviet.
Triumph Cafe Racer Episode: 3
Anglaise, certes... Aftermarket fuel tank - Dunstall maybe?? The picture is too indistinct for positive id but it might be a Triton.
Triumph engine, Cafe Racer.