When watching Shark, Lie to Me and Castle which were all released in the late 2000s, it ocurred to me that they all pose their strong but slightly eccentric/difficult male protagonists as divorced fathers with a single daughter that shares quite similar characteristics across those different shows. No matter if taking Julie Stark, Emily Lightman or Alexis Castle, they are all daughters in late high school to college age, quite intelligent, reliable and grown-up (in a psychological sense) and more than one time seem to be good for an advice or word of reason to their fathers.
I see that those are only three TV-shows from a feeled thousands, but seeing that they were released at roughly the same time and, together with their similar genres of more or less crime shows anchored around a characteristic protagonist, share a very similar father-daughter relationship, it was a pattern that struck me as pretty obvious.
So first of all, is there a general trend for those particular character constructions in other similar shows or is there any information if those shows might have influenced each other or were inspired by something else in particular? And, even more important, what are the narrative advantages of such a character constellation? In which way does it support the themes and stories of those shows and the development of their protagonists.