Choudhury's departure, after his team made a loss of £169 selling bric-a-brac, pulled in a 30.4% share of the 9pm-10pm audience.
Choudhury hit back at Sir Alan Sugar's comment that he had "escaped the radar" claiming he was "the life and soul of the party" and that the editing was a factor in how candidates came across in the show.
ITV1's 'Midsomer Murders', starring John Nettles, came in second in the ratings battle with 4.2m viewers and an 18% share of the 8pm-10pm audience.
Last night saw Barnaby investigating the death of man found in the weir and untangling the wills produced by his friends, each claiming to inherit his fortune.
'Grand Designs', which saw presenter Kevin McCloud revisiting woodsman Ben Law's timber framed forest home in West Sussex, netted 2m viewers and an 8.2% share of the 9pm-10pm audience on Channel 4.
Including Channel 4+1 figures it reached 2.3m viewers.
Five's 'Extraordinary People: Octopus Man' documentary, featuring a Filipino man who was born with three extra limbs attached to his abdomen, won 1.1m viewers and a 4.3% share of the audience.
BBC Two's documentary series 'Rain', showing how and why rain falls and telling stories of how we have adapted or succumbed to this elemental force of nature, attracted 997,000 viewers and a 4% share of the audience.
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