Just watched episode 3 with Nate and that was so much better. It was more about the bass and the bass lines rather than 'look at me, I'm interesting' like the other two main bassists.
In hindsight, I think the producers should have focused on three different styles of bass and perhaps done an episode with Bootsy, Mark King, Guy Pratt, Gail Ann Dorsey, Daryl Jones, Norman (Fat Boy Slim), the reggae bassist and the other black guy and focused on Funk, Disco, Dance, Pop, Motown, Soul and Reggae and the styles and great bassists that influenced those genres. See if you can get other bassists involved like Stuart Zender, Flea, John Taylor, Marcus Miller and Victor Wooten involved or talked about.
Then another episode with Nate, Melissa, Hooky, Glen Matlock, Adam Clayton, Krist from Nirvana, Alex James, Mani, the girl bassist and focus on indie, punk, rock, grunge, metal and show the bits about John Entwistle, Jack Bruce, Queen etc. Try and get bassists like Geddy, Sting, Robert Trujillo, Jeff Ament and probably a whole bunch of other bassists who I can't remember involved.
Then another episode to focus on everything else bass related like the history of bass and technique which they touched on like slap, fretless, pick playing and different styles. Also discuss equipment so the P-Bass, double bass, uke basses, amps, pedals and everyone who contributed in the other episodes can add there little bit, for example, Mark King showing slap and Nate showing playing with a pick etc.