Former members speak out about the sect that claimed more than 70 lives. Plus: Bill Bailey’s master craftsmen. Here’s watch to watch this evening

10pm, BBC FourThis documentary is like watching a horror movie brought to life. It speaks to people who investigated the Order of the Solar Temple – an apocalyptic cult in which, during the 1990s, 74 of its members died – starting with macabre footage of what they found when they investigated seemingly unrelated fatal house fires in Canada and Switzerland. Former members also give their disturbing accounts. Hollie Richardson

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