 When Hatton (Ben Kingsley) receives his clients after their time  safari, he likes to compare them with great explorers: Marco Polo,  Columbus, Armstrong... and he also says "like Brubaker on Mars",  remembering a future (past for him) conquest of the Red Planet.  Brubaker was the name of the commander of the Mars expedition in the  film _Capricorn One (1978)_ (qv)