my wife and kate and i absolutely love the series and can not wait for the next one ( hopefully there be a sequel . ) . i would love to know what the catchy song be call and who write it and maybe because i be old and grey and still interested in life represent ) . if anyone have the full lyric please send them . of course one big reason why my wife and i like this series so much be that we be 75 year old and retire but still very active intellectually . it great to see a show that highlight the contribution to society that can still be make by old people with special skill and experience . the human interest aspect show the interaction of the character and the young people around them be an important part of the show . this series be highly entertaining and very sophisticated and on a par with some of our other favourite and spook and hustle .