However, Marvel UK began to hit a number of problems. First, being published weekly meant that in some cases the reprint material would run out as the UK caught up with the matching US title; while sometimes this would prompt a break in the run of a given strip, a more innovative approach was tried when Planet of the Apes hit this problem, and copies of Killraven's escapades from Amazing Adventures were redrawn and relettered to give Killraven black hair and to pit him against Apes instead of Martians, as the renamed Apeslayer.




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