Still Open All Hours - Season 1 Episode 4 -

As Granville prepares to open a coffee bar in the back yard of the shop and to sell unsuspecting customers out of date salami which he passes off as life-giving 'yaggis' Wet Eric is stuck with trying to cheer up visiting brother-in-law, the permanently depressed Lester. Needless to say the grand opening of the coffee bar leaves everybody feeling depressed due to faulty furniture and an exploding coffee machine.