Apprentice contender Raleigh Addington has revealed that he quit the show to dash to his brother's side after he was badly wounded serving in Afghanistan.
Viewers will not see him leave in tonight's episode but the 23-year-old said there was "never any question" of staying on the show after hearing the news.
His brother, Captain Ed Addington, was injured in an explosion just before the candidates were due to be briefed on their second task on the hit BBC One reality show.
Raleigh said: "At the start of the second task, I was contacted by the producer of the programme who told me that my mother was on the emergency number and I immediately feared the worst. My mind was buzzing with all kinds of emotions, had Ed been killed or injured in Afghanistan."
His brother was flown to Selly Oak hospital in Birmingham suffering from a collapsed lung, a brain haemorrhage and multiple fractures to his arms and legs.
Raleigh said: "He was lucky to be alive. There was never any question of me staying in the show and I knew that I had to be with my parents and my two other brothers to support Ed. I walked out in a daze, not really being able to comprehend the gravity of the events. Lord Sugar gave me a call after I left to make sure my brother and family were OK - it was great to hear from him."
The rest of tonight's show sees the candidates summoned to Heathrow Airport for a holiday-themed task with the aspiring tycoons asked to develop a new beach accessory.