I think that sensual, S, people, approach the experience in a straightforward co-operative way, while intuitive, N, people criticise the abstract concept of the documentary.
Niel who wanted to be an astronaut is mildly mentally ill. I think he has had a hard time, and his illness looks to me like a response to stress, lack of family affection, and failure to find a social role that suited him when he was in his twenties. I think he is probably INFP (introvert, softhearted, intuitive): he didn't critique the documentary, though he did question 'what people must think of me'. Possibly he was ISFP instead (introvert sensual). He loved nature, and was very self critical like the Australian ISFP from last week.
Nick the scientist living in the USA was INTJ (introvert intellectual). He said 'I don't get how other people feel'. I felt he was very guarded, and also attractive to women, and it was noticeable that he had had two wives over the years and in both cases he let his wife do the speaking for both of them. Age 14 when asked a question about girls he said 'you're asking me that because my answer last time was funny' - that's abstract intelligence and introversion in one sentence. In previous years he has been critical of the documentary, and 7 years ago said he wouldn't take part any more, but he seemed to have built up a protective layer (and a protective wife) since then.
Lynne was a straightforward very likeable character, she cared for disabled youngsters and ran a library service. A very typical mature ISFJ (introvert, kindly, sensible), the personality type of the nurse and carer. A happy person.
Simon, the only black person involved in the documentary, was I think ESFP (extrovert soft hearted sensual). He said 'I hate discipline', he had an easy-going attitude, and a lot of children. When asked what he looked for in a relationship said 'I want a wife who gives me hot dinners and a warm bed' and then saw his wife looking at him and muttered something about 'not really'. Cheerful, likeable, not ambitious.
Andrew was a fairly boring lawyer. I think he was ESTJ like Tony the taxi driver, and like Tony he owned two homes.
John was an upper class opinionated git, and every 7 years he reinforces that role. I think he was almost a case study of ENTJ personality (extrovert, dominant, intellectual). From age 14 when asked what he wanted in life he said 'power'. He wasn't just aware of the concept of the documentry. He was deliberately using his involvement in the documentary to further various instrumental ends - for example his charitable work in Bulgaria - and was quite self-satisfied with how well he had managed it. Not a likeable character, but probably the most effective operator.