I have a recall that this could be Crossroads. As a kid in the early 1970s, there was no more-than-one-telly-option in almost every household, unless you went to the high street and stood in front of the Radio Rentals shop window so I had no choice but to watch the programme as it was my mother's favourite show (along with The Brothers but that's because I secretly think she fancied them).
I remember the twangy-style end theme tune and credits, coming across and up into the screen like a line-by-line crossword and along with the cast, Tony Hatch (and possibly Jackie Trent but not sure about her) I'm sure Hazel Adair & Peter Ling's names came up too, right at the very end (or possibly sooner).