A gobsmacking documentary about the mysterious man who bought MGM studios in 1990. Plus: is the Vinted app too good to be true? Here’s what to watch this evening

9pm, BBC Two
“One of the most enigmatic deals in Hollywood.” Insiders tell film-maker John Dower the scandalous story of Giancarlo Parretti, one that has all the makings of a juicy movie script. Parretti was a former waiter with a “murky past” who bought the MGM studios for $1.3bn in 1990 – but he couldn’t account for the mysterious money he handed over. He helps tell the full tale himself in a lively documentary. Hollie Richardson