Complex sentence: The alarm is raised at pigeon headquarters when Pigeon 13 (a Mortimer Snerd-esque yokel similar to Beaky Buzzard) goes AWOL with the female Nazi spy bird, to whom he reveals all his secrets (after she slipped him a mickey).
Split into simpler sentences: The alarm is raised at pigeon headquarters when Pigeon 13 (a Mortimer Snerd-esque yokel similar to Beaky Buzzard) goes AWOL with the female Nazi spy bird. He reveals all his secrets (after she slipped him a mickey).