Montgomery Wick's name is an obvious reference to Thomas Montgomerie and Jim Wickwire. Montgomerie discovered K2, and Jim Wickwire was the first American to climb K2. Wickwire also lost several toes on the mountain, similar to the character Montgomery Wick.
The toeless feet of character "Montgomery Wick" seen at the beginning of the film actually belong to mountaineer Mark Whetu, who lost his toes while spending a night outdoors above 28,000 feet during a 1994 attempt on Everest.
Martin Campbell's 3rd collaboration with Stuart Wilson, whom he had previously worked with on "No Escape" and "The Mask of Zorro" and Martin Campbell's 2nd collaboration with Izabella Scorupco, whom he worked with on "GoldenEye".