Simpsons character Krusty The Clown upset viewers by swearing at a time when children were likely to be watching the show, prompting complaints to Ofcom.
The washed-up boozy clown was heard to use the word "bastard" during an edition of the programme screened by Channel 4 at 6pm in April, well before the 9pm watershed.
The station apologised for the incident which it said was due to human error and controls have been tightened to ensure that future episodes were suitable to be screened during family viewing times.
Ofcom - which received seven complaints from viewers about the bad language decided not to take the matter any further in the wake of the apology and the steps taken by Channel 4 to avoid a repeat.
There has been speculation that Krusty is to be killed off by programme bosses.