Big Brother Africa 4 (also known as Big Brother Africa: Revolution) was the fourth series of the Big Brother Africa reality television series produced by Endemol. The series began airing on September 6, 2009, and aired for 92 days, ending on December 6, 2009, on M-Net. Nigerian television star IK Osakioduwa was the new host for the series. The grand prize fund this year is $200,000.[1]
A total of 25 housemates entered the House, an increase than previous series. Fourteen countries; Angola, Botswana, Ethiopia, Ghana, Malawi, Mozambique, Namibia, Nigeria, Kenya, South Africa, Uganda, Tanzania, Zambia and Zimbabwe participated in this year's series.[1] On Day 0, twelve male housemates entered the House. During week one, Edward's twin, Erastus, switched places with each other. They will switch on and off in the first two weeks. On Day 7, twelve female housemates entered a secret House next door. On Day 14, Edward and Erastus was revealed to the male housemates as twins, and from now on will play as individuals.
Each week the housemates must nominate two of their fellow housemates for eviction. Each week the HoH must choose to save one of the initial evictees and replace them with another housemate. In weeks when more than two housemates are nominated for eviction the voting results to save are revealed as evict votes which go to housemates who received the fewest votes in a country or countries. Any changes that affect nominations are noted.
Many fans were not happy about the inequality of number of housemates per representing country. They were emphasizing on how some countries had three participants (e.g. Namibia, Nigeria) while other countries simply had one participant (e.g. Botswana, Malawi, Ethiopia, Ghana - whose only participant was evicted on the first week on the show). The fans complained about the issue to M-Net after how unfair the balance of the game was.