After a year of waiting, Amazon have finally sent me disc 1, Season 2 of Knight Rider
http://www.amazon.co.uk/exec/obidos/ASIN/B0009NS9EW/qid=1142420252/sr=8-2/ref=pd_ka_2/026-0058056-7028455
Reading the reviews, this appears to be the best season, and the introduction of Garth, Michael's twin brother, complete with £2.99 fake moustache, is inspired.
http://www.teamknightrider.com/classic/episodes/season2/season2.html
I'm working my way through
http://www.amazon.co.uk/exec/obidos/ASIN/B0002VF6BU/qid=1142420515/sr=2-2/ref=sr_2_11_2/026-0058056-7028455
http://www.amazon.co.uk/exec/obidos/ASIN/B0007VXZAE/qid=1142420571/sr=1-1/ref=sr_1_3_1/026-0058056-7028455
http://www.amazon.co.uk/exec/obidos/ASIN/B000777UEU/qid=1142420629/sr=1-2/ref=sr_1_11_2/026-0058056-7028455
but Knight Rider has to be the best.