▁as ▁ 1 st ▁German ▁Officer ▁ ▁Frederick ▁Ja eg er ▁as ▁ 2 nd ▁German ▁Officer ▁ ▁Richard ▁Mar ner ▁as ▁German ▁Guard ▁ ▁Peter ▁Ar ne ▁as ▁British ▁Long ▁Range ▁Des ert ▁Group ▁officer ▁at ▁o asis ▁ ▁Paul ▁St ass ino ▁as ▁the ▁bar man ▁ ▁Production ▁The ▁film ▁was ▁based ▁on ▁the ▁ 1 9 5 7 ▁novel ▁Ice ▁Cold ▁in ▁Alex ▁and ▁its ▁serial ization ▁( as ▁Es cape ▁in ▁the ▁Des ert ) ▁in ▁the ▁magazine ▁Saturday ▁Even ing ▁Post . ▁The ▁script ▁made ▁a ▁number ▁of ▁key ▁changes ▁from ▁the ▁novel . ▁ ▁The ▁produ cers ▁had ▁intended ▁to ▁shoot ▁the ▁location ▁work ▁for ▁Ice ▁Cold ▁in ▁Alex ▁in ▁Egypt , ▁but ▁the ▁produ cers ▁had ▁to ▁switch ▁to ▁Lib ya ▁because ▁of ▁the ▁S uez ▁conflict . ▁Syl via ▁Sym s ▁( S ister ▁Mur do ch ) ▁said ▁in ▁a ▁ 2 0 1 1 ▁interview ▁about ▁the ▁film ▁that ▁conditions ▁during ▁the ▁desert ▁shoot ▁were ▁so ▁difficult ▁it ▁felt ▁like ▁they ▁were ▁actually ▁in ▁the ▁situation ▁the ▁film ▁port ray s . ▁She ▁said : ▁" You ▁may ▁find ▁this ▁hard ▁to ▁believe , ▁but ▁there ▁was ▁very ▁little ▁acting . ▁It ▁was ▁hor rible . ▁We ▁became ▁those ▁people ▁... ▁we ▁were ▁those ▁people ". ▁She ▁said ▁that ▁today ▁people ▁would ▁probably ▁call ▁it ▁method ▁acting , ▁but ▁added : ▁' We ▁didn ' t ▁know ▁what ▁Method ▁Act ing ▁was , ▁we ▁just ▁called ▁it ▁' getting ▁on ▁with ▁it '