South Park Digital Studios, the joint venture between South Park creators Trey Parker and Matt Stone and the Viacom-owned Comedy Central UK, has launched South Park On Demand.
At launch, the online service will offer 50 of the "funniest episodes" from the South Park archive, including classics such as 'Fishsticks', 'The Death of Eric Cartman' and the Emmy award-winning 'Imaginationland'.
The launch episodes were chosen by UK fans in a poll on Southparkstudios.co.uk. The service will also be "refreshed on a monthly basis with input from fans".
Alongside the selected episodes, South Park On Demand will offer season catch-up, starting with season 16 and extending to the new season premiere in October.
Episodes will be available within 24 hours of their transmission and can be viewed over a seven-day period. Users can pay £2 to access content for 24 hours and £3 for 7 days.
"South Park has been on our TV screens and pushing boundaries since the late '90s," said Philip O'Ferrall, the senior vice-president of digital at Viacom International Media Networks.
"We are launching the South Park On Demand in response to the huge demand that we have experienced on our sites for full-length episodes of this iconic show.
"This online service extends our 360 strategy around South Park content, increases engagement with the brand and enables us to make our show more available to fans than ever before."
Comedy Central UK vice-president of business development Tony Crowe added: "We know that the South Park audience are always connected and using multiple platforms to access content. We developed South Park On Demand to provide the easiest way for fans to instantly access what they are looking for.
"We also wanted to give fans the opportunity to influence which episodes they want to be included every month. They can vote for their favourites via the contact page to ensure the content that they want is only a click away."
Watch the Mad Men-inspired South Park season 16 trailer below: