I find a similar thing with Murdoch Mysteries, about a Catholic detective in Toronto at the turn of the century.
Re the subject series, it was nice in the episode where Fr Brown refused to break the seal of the confessional – including to the bishop, or to even verify any information that would allow the bishop to even suss out who made a confession. I think the policeman even stuck the good father in the lockup for a bit, but Fr Brown kept mouth clamped tightly shut.
Also, Father Brown is a true believer, but also an intellectual, who not only sees no conflict between faith and reason, but knows that the two are complimentary.
OTOH: I am not familiar with the pre-Vatican II church, but I am fairly sure a parish priest would not be caught dead with two women (Mrs McCarthy and especially Lady Felicia) in his bedroom, and him only in his jammies and no bathrobe. And did priests always wear a cassock out and about, or did they wear black suits with black clerical shirt and Roman collar? I though cassocks were restricted to the church grounds, for some reason.