Ha! I was thinking of posting this one! lol
Arguably the strongest of the DuMont stations was WDTV in Pittsburgh, which the network owned. At the time, it was the only VHF station in Pittsburgh (there was a freeze on VHF until the mid-late 50s, though there were a couple UHF stations that few people could get), so in order for the other networks to get their best shows on the station, they had to air DuMont shows on their O&O stations. But DuMont was running out of money, so they were forced to sell the station. Once they sold to Westinghouse, which turned it into KDKA-TV, DuMont no longer had leverage. They went belly-up soon after.