 In the United Kingdom, Endemol is mostly known for producing both "Big Brother" (2000–2018) and "Celebrity Big Brother" (2001–2018).The company originated from Peter Bazalgette's sale of his television company Bazal to the Guardian Media Group (GMG) in 1990.In September 1998, Endemol acquired a 50% stake and the division was named GMG Endemol.