Only watched the first two episodes.
Other than the old guy, who strangely chain-smoked through the first episode, but not at all in the second, the acting was terrible. I think it would have been better just using him as the main character.
Around him there were too many 'pretty' characters, and that was about all they contributed.
Some sort of chase scene through the streets seemed inevitable, and the actual storyline was poor.
At least there was no swearing so it could safely be deemed 'family viewing'.
I wish they would just go back to making the old Agatha Christie style whodunnits without the silliness that now plagues the genre.