[ACTV]

Around the early 00s, Channel 4 just seemed to use adult animation as daytime or late night filler. Futurama was of course continually shunted around and King of the Hill mostly seemed to turn up after 11pm or so. Whilst they did air the bulk of adult animation back then, the only one which aired consistently in prime time slots was South Park, presumably as that was the edgiest one around at the time.

It wasn't until The Simpsons that Channel 4 found another US adult animation to run constantly, infact South Park was completely gone from C4 by the end of 2005.