I've just watched on you tube and it's a brilliant episode. I can't work out why, but for some reason I missed it on all the reruns on itv too so it's the first time since 75 that I've seen it. I love the summer heat of 1975 which comes across in the location filming. Like the Mini too which Jack got to use, bit of a change from NHK!
One of the villains was the chef from series 2 of Fawlty Towers.