The Thora on the Straight and Narrow episodes are a four-part series that took the lads through a kind of musical pop-up-book version of Pilgrim’s Progress (with participation and commentary by beloved British actress Dame Thora Hird). 　　From Libera Boys Choir Database 　　Thora Hird presented this 4 part series which was aired in the UK 1993. The series was about a famous picture ca... (展开全部)