London, December 31: Bosses of British reality show `Celebrity Big Brother' have ordered their new contestants to watch the last series, which was inflicted with racism row, to tutor them against offending viewers.

The previous series had been cancelled following the storm in 2007 when Jade Goody, Danielle Lloyd and Jo O'Meara were accused of bullying Bollywood housemate Shilpa Shetty.

The alleged undertones of racism against the Indian actress had attracted 50,000 public complaints to the UK broadcasting watchdog Ofcom.

In a bid to make the 2009 show free from another fiasco, the chiefs have personally met with every one of the 11 contestants, putting out a word of caution not to breach the line, reports the Sun.

Executive producer Sharon Powers said: "We told everyone to look on YouTube and sent them DVDs. We've spoken to them all in detail about what the boundaries are." (ANI)