The opening theme for this final episode is an a cappella or choral version of the original theme music.
Some info about the business jet provided for Tench and Ford near the end: N399P Aircraft Registration; 1968 NORTH AMERICAN NA-265-40; fixed-wing multi-engine (9 seats/2 engines); owner PITTSBURGH INSTITUTE OF AERONAUTICS, Pittsburgh, PA.
Tench referred to Wayne Williams as the next Berry Gordy. Gordy was the founder of Motown.