Actually keeping it simple was Norman, who tried flamboyantly promising to conjure a Tarte au Citron. He was immediately shot down by Paul, who knows a plain lemon tart with a fancy French name when he sees one.
Custard tarts, it turns out, offer a series of technical bear traps. The egg to flavour ratio has to be right, to avoid both an escaped filling and a congealed sweet quiche.
Edging off the surplus from the top of the tart was a particularly stiff test. Luis danced round, wielding his knife like Michaelangelo. Norman was more like Jacko from Brush Strokes. A more surprising fail came when fillings were added: Richard the Sensitive Builder was the only contestant not to realise that pouring in the liquid with the pastry case still in the oven was the way to avoid spillage. With Mel hovering unhelpfully four inches away ("Well done, well done… DON'T SPILL IT!"), Richard slopped his figgy egg all down his tart.
The judging was largely a massacre, with Norman's effort to cover his wonky crust with a kilo of icing sugar unsuccessful, and Richard and Kate's fruit flavours failing to cut through the custard. Martha's apricot and pistachio creation was sour, soggy and lacking shine. She looked slightly upset when talking to Paul and Mary, then very upset when the camera cut to her during the song of praise for Luis' elegant tropical tart.
The same editors who had made Diana look like a master criminal now rammed it home by interrupting Paul's raptures a second time to confirm poor Martha was in tears, before rounding off with a post-match interview where she definitely was. Lovely.
Pear pies formed a particularly horrid technical bake: pears (obviously), poached and then wrapped in swirls of puff pastry. Uncertainty was rife. Martha, trying to recover from her tart collapse, admitted sneaking a peek at her rivals to get a steer on when to stop poaching. Even Mel was affected, holding up two of Luis' fruits and saying "I've got a nice pair" before visibly regretting having made a pun too thunderingly awful even for Bake Off.
In adversity, and with us now fully behind her, Martha started to fight back. Having cannily realised that the pears needed to be chilled if the pastry was going to stick, she also clocked that everyone was running out of time and put each wrapped pear in the oven as soon as it was ready, instead of faffing over all six together. That was enough to win the round.