Some fantastic stuff on this thread - for me in no particular order:
Star Trek - original series, it boldly went and didn't look back
Hill Street Blues - made me both yearn to go to Noo Yoik and scared to go at the same time
The Persuaders - true bromance, Sunday afternoon style in the 1970s, I
really wanted to be like Curtis and Moore when I was eight
Twin Peaks - complete television joy
The Old Grey Whistle Test - where you could watch really cool music that wouldn't air on TOTP
The Jeremy Brett Sherlock Holmes - I was the only one in the house who wanted to watch this over the Young Once before we had a video recorder
The Clangers - The Soup Dragon has always been a role model for me
Dr Who - enough said, the OG
Thunderbirds double A side with Captain Scarlet- if anything sums up childhood it's this
Question Time - always enjoyed it since the Robin Day era, shame that so many panelists are point scoring idiots these days - I learned a great deal growing up by watching serious politicians debate respectfully, and my Gran got to ask a question once!