Mel Blanc joined the show on February 19th, 1939. Benny was adding a new touch to the miser theme: a polar bear, who would live in his basement and help protect his money. The bear was christened Carmichael, and in 1941, according to Rochester, he ate the gas man.

On Sunday December 7th, 1941 Japan attacked Pearl Harbor and Manila, thrusting the United States into World War II. That evening, The Jell-O Program signed on at 7PM eastern time. This is audio from that night.

Benny’s show peaked in 1941 with an average rating of 30.8. By 1942 Jack was beginning to get into disagreements with General Foods.

Variety reported as early as 1939 that the sponsor wanted to change Jack’s sponsorship to Grape Nuts Flakes. Jack resisted the move. The Jell-O brand had become uniquely associated with Benny.

However, by 1942 with wartime sugar rationing, General Foods pushed the product change through. Variety reported on March 4th, 1942 that Benny would take Grape Nuts Flakes, while Kate Smith would now be sponsored by Jell-O.

General Foods claimed the output of Jell-O would be so limited by the fall that they couldn’t justify the cost of Benny’s show. The Jack Benny Program cost General Foods twenty-two-thousand dollars per week. Kate Smith’s show only cost ten thousand.

With the October 4th, 1942 season premiere the show became The Grape-Nuts Flakes Program Starring Jack Benny. Benny wasn’t thrilled, also feeling General Foods hadn’t done enough to promote his show. After back-to-back seasons with a rating over thirty points, Benny 1942-43 rating slipped to 26.3, losing roughly two million listeners.

Jack had a unique contract. Thanks to a verbal agreement with NBC’s President Niles Trammel, Jack controlled his Sunday timeslot. At the end of Jack’s next contract he was free to approach any sponsor, pending NBC’s approval. It meant that General Foods could lose their top star and their top time slot.