Like rwebster said, you have four of Lord Sugar's "business associates" grilling the five remaining applicants.
The interviews take most of the day and as there is usually one extra interviewee than there are interviewers, it means that somebody is always waiting nervously in the lobby to be called in somewhere.
It sounds really boring when you say "interviews" but it's not as they do give them a hard time and take them apart.
After the interviews are over, the "business associates" gather in the boardroom with Alan Sugar, Nick and Karen and give their verdict on the people they have seen.
The five remaining applicants will then be called into the Boardroom and it wil be like previous weeks when they all have to defend themselves and it will end up with three of them being fired, leaving two left for the final next week.
Enjoy