like, sam and al were good friends before sam leapt, the show establishes that much. we know that sam helped al through his alcoholism and al helped get project quantum leap off the ground, so they've presumably bonded over those experiences. but as the show reveals more about al you grow to understand that he has a well of deeply painful memories and associations that sam is completely unaware of. he'll hint at them with 'nam references or ex-wife jokes, but not touch them -- not unless he's forced into it (like in MIA) or if he feels it's necessary to help sam. so sam's memory loss intersects with al's emotional reticence in this really fascinating, kinda fucked up way... what has sam forgotten about al, and what has al omitted?