I have to admit I just don't recall the Tomorrow People on TV at all, but then again I 've decided my memory of my youth is pretty useless, so I may well have seen it.
Seeing this 1974 Piccolo paperback, Three in Three, in a junk shop didn't jog my brain at all either.
I've just read the Wiki entry for the show and can't believe there's a link between it and David Bowie, who I will have been adoring in 1973 when the series aired. Turns out that the series' author talked to Bowie about the Homo Superior, which David then used in his 1971 song Oh You Pretty Things on his fabulous Hunky Dory LP, two years prior to the Tomorrow People airing.
I digress.
Was it an important TV series for you readers, the Tomorrow People?