Illya Kuryakin meets Purdey Love this series, though as a kid it freaked me out. The last link cited below makes for interesting reading.

aconitum-napellus:

Sapphire and Steel. Joanna Lumley and David McCallum. 1979-1982.

‘All irregularities will be handled by the forces controlling each dimension. Transuranic, heavy elements may not be used where there is life. Medium atomic weights are available: Gold, Lead, Copper…Jet, Diamond, Radium, Sapphire, Silver and Steel. Sapphire and Steel, have been assigned.’

Who cares that Sapphire and Steel aren’t elements? It was an awesome, terrifying series.

http://www.picturenose.com/sapphire-steel-1979-1982-movie-review.html

And this is interesting - http://www.davidmccallumfansonline.com/lumley.htm