Fans of Torchwood should check out BBC Knowledge tonight as John Barrowman asks “why am I the way I am?”
Barrowman is one of several celebs who will endeavour to discover what the latest scientific research can tell them about a defining trait, talent or characteristic.
In his case it is to investigate the origins of his homosexuality.
Later eps will feature Colin Jackson and his athletic ability; and Vanessa-Mae discovering the roots of her musical skills.
The series asks what part did their early upbringing play? Did their family background contribute? What surprising insights do biology and genetics have to offer? And have there been any down sides to their trait?
The Making of Me starts tonight with John Barrowman at 7:30pm on BBC Knowledge.