The Ricky Gervais Show
XFM Radio 
The show started in November 2001 on Xfm, and aired in weekly periods for months at a time throughout 2002, 2003, 2004, and mid-2005.
In November 2005, the Positive Internet Company hosted the show on behalf of The Guardian as a podcast as a series of 12 shows. Throughout January and February 2006, the podcast was consistently ranked the number one podcast in the world; it may appear in the 2007 Guinness World Record for the world's most downloaded podcast, having gained an average of 261,670 downloads per episode during its first month.
The beginning of season two saw the show moving to the "Audiobook" format, as it was decided that they should be paid since it cost money for them to make the show - the first season was paid for by the Guardian.
The fourth season returned to the "Podcast" format, and was free, a thank you from the makers for all of the people that downloaded the first three seasons.