As ABBA mark 50 years since winning the 1974 Eurovision Song Contest, it's time to take another voyage into the archives for more of the Swedish supergroup’s best BBC moments. As well as looking back, this collection brings things right up to date, capturing the excitement and sounds of their recent, technologically pioneering stage shows. Sitting alongside the new material are plenty of classics that highlight Benny and Bjorn’s fondness for a song title that repeats itself: Ring, Ring, Honey, Honey, Money, Money, Money and I Do, I Do, I Do, I Do, I Do. And there's also an exclusive performance of the song So Long, which had been lost from the BBC archives and was assumed to be missing forever but has been recovered and restored and is shown again here for the first time since its original transmission in 1974.