1st of 3 stories in Four Color #1311, titled Rocky and His Friends - Reprinted in Bullwinkle #7 04/1973 and Bullwinkle and Rocky #23 10/1979 - 8 pages:
Boris is being replaced by Ivan Hoodnik who has a plan for eliminating Bullwinkle by giving him a membership in a health club. Boris knows he must cause Ivan to fail to get his job back.