There is something magic about watching these old TOTP reruns - not because the music is any good, it's just that they are packed full of genuine WTF moments; from the hair dos and dancing to the artists and schtick of the presenters. Looking at it now, it is other worldly - so far has music and pop culture moved on. Don't get me wrong, whatever generation you are, there are real quality tunes here, though, unfortunately these are punctuated by jaw-dropping examples of how bad manufactured pop bands can be. So pull up a chair and enjoy Top of the Pops performances from 1978, with Sham 69, Ian Dury, Elvis Costello, Blondie, The Boomtown Rats, Kate Bush, Dan Hill, Boney M, Bob Marley, 10cc, ELO and Manfred Mann. Top of the Pops 1978: Big Hits - Friday 10.30pm on BBC4.