Blondie (comic strip) was adapted into a long-running series of 28 low-budget theatrical B-features, produced by Columbia Pictures. Beginning with "Blondie" in 1938, the series lasted 12 years, through "Beware of Blondie" (1950). The two major roles were Penny Singleton as Blondie and Arthur Lake (whose first starring role was another comic strip character, Harold Teen) as Dagwood. Faithfulness to the comic strip was a major concern of the creators of the series. Little touches were added that were iconic to the strip, like the appearance of Dagwood's famous sandwiches—and the running gag of Dagwood colliding with the mailman amid a flurry of
What a Cartoon! final short of the 48 contracted during Seibert's era aired. In 1998, Cartoon Network debuted two new short pilots and advertised them as "World Premiere Toons": "Mike, Lu & Og" and "Kenny and the Chimp", both of which were produced by outside studios. The two pilots were later compiled into "The Cartoon Cartoon Show", while both shorts eventually garnered their own series, "Mike, Lu & Og" in 1999 and "" in 2002. Two pilots entitled "King Crab: Space Crustacean" and "Thrillseeker", respectively dated 1999 and 2000, was also retconned into "The Cartoon Cartoon Show" anthology. On June 9, 2000, "The