What is the name of the song that plays in the first trailer of the black donnellys television show? Some of the lerics are " hold on to what you've got".

I'm living in Poland at the moment so unfortunately don't know the TV programme you mentioned. The only song that comes to mind with those lyrics is 'Livin'on a Prayer' by Bon Jovi, possibly not what you're looking for, but a good song all the same. Good luck!