It was, though I only realised immediately after posting, it was actually a repeat: first shown just over 2 years ago.
Don't know how I missed it, then.
Anyhow they won! David was excellent, sadly Eos got knocked out the final by falling on her last question...
She failed to recognise Wilfred Owen's Dulce et Decorum est...which frankly is unforgivable. Ha.
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http://professorfangirl.tumblr.com/post/105838327464/heres-an-outtake-of-mark-gatiss-on-the