Taskmaster

The concept for the programme was first created by Horne for the Edinburgh Festival Fringe in 2010; he later secured a deal with Dave to adapt it for television with the first episode premiering in 2015. After the ninth series in 2019, the programme was acquired by Channel 4. The programme has completed 22 series, as well as five Champion of Champions episodes and seven New Year Treat episodes as of November 2026, and is commissioned to continue up to series 27 in 2029 as well as more Champion of Champions and New Year Treat episodes.

Taskmaster's success on British television led to international versions in Australia, Belgium, Croatia, Denmark, Estonia, Finland, Iceland, Netherlands, New Zealand, Norway, Poland, Portugal, Canada (Quebec), Sweden, Spain and the United States, the last of which featured Horne reprising his role as the Taskmaster's assistant.

The show's 22nd series, featuring Chloe Petts, Isy Suttie, Matt Lucas, Nina Conti, and Richard Ayoade, aired from September to November 2026.

A British spin-off series, Junior Taskmaster, with children as competitors, aired on Channel 4 in November and December 2024, with Rose Matafeo as Taskmaster and Mike Wozniak as the assistant (both former contestants on Taskmaster). Additionally, a tie-in board game, two books, and a VR game have been released, as well as a live experience. During the COVID-19 pandemic, Horne hosted #HomeTasking, a series of tasks for people to film in their own homes; for each task, a montage of attempts was posted on YouTube that featured Davies awarding points to his favourite entries.