The episode format for Kaamelott was at first very short. Unaired pilot episodes attempted a six-minute format that was rejected by the television network. Broadcast episodes from seasons 1 to 4 lasted about three and a half minutes, the same as Caméra Café. These seasons are made up of 100 short episodes, and originally seven such seasons were planned by Astier and M6. A season is referred to as a "livre" (French for "book") in the promotional material and DVD covers.
The episodes were broadcast on M6 in France starting in 2005 in prime time (8:30 PM to 8:40 PM), twice every weeknight evening for seasons 1–4. The week's full ten episodes were aired on the Saturday of that same week. Each such season lasted ten weeks. A week's worth of episodes is about 35 minutes, comparable to the American one-hour network format of ca. 44 minutes or the British half-hour format of 30 minutes. Each episode features a teaser, opening titles, three acts, closing titles, and a tag, like an American sitcom episode. Season 1 aired early in 2005, 2 in fall 2005, 3 early in 2006, and 4 in fall 2006.
Each season attracted more viewers, with records reaching about 5 million viewers each evening.
The first half of season 5 aired in spring 2007 as two 52-minute episodes, followed by 5 weeks of 7-minute episodes (telling the same story, but with additional material) presented on the same schedule as the earlier seasons. The second half followed the same format in the fall of 2007.
Season 4 was the first to feature an overarching story arc. Whereas in the earlier seasons one could watch the short episodes in any order, in season 4 more than half the episodes were connected to a plot (and episodes 99 and 100 form a single episode with no break).
Season 5 features several intertwining plots presented chronologically throughout the season. This presented storytelling and editing problems that were incompatible with the old 3½-minute format, resulting in at least 3 different versions of season 5: 3 52-minute episodes as televised, 50 7-minute episodes as televised, and 8 52-minute episodes in the DVD "director's cut." In the interview on the DVD, Astier explains that season 5 must be seen in the director's cut version.
Season 6 was always conceived of, from the time shooting began, as a series of 40-minute episodes presented as a miniseries, not cut into shorter episodes.
Around the time that shooting began on season 6, Astier announced that there would be no season 7. Season 6 consists of a prequel (how Arthur became king of Britain) followed by an episode that serves as a sequel to season 5.