Primodos was a pregnancy test pill prescribed regularly in the 1960s that used a massive dose of hormones to produce results. Soon after its introduction women who'd used it were giving birth to babies with deformities. For decades the victims and their families have been campaigning for their case to be heard. Now Sky News journalist Jason Farrell presents the findings of his six-year investigation, in which he alleges a cover-up and collusion between Primodos' manufacturer and the UK medicines regulator. One of the campaigning mothers gives a sorrowful reason for their fight: “Until we have an answer, we always have to consider that we're to blame.”