An au pair seems too good to be true in The Intruder. Plus: Amanda Holden’s impossible new gameshow – and movie week on Strictly! Here’s what to watch this evening An au pair seems too good to be true in The Intruder. Plus: Amanda Holden’s impossible new gameshow – and movie week on Strictly! Here’s what to watch this evening 9pm, BBC Four A claustrophobic “don’t trust the perfect nanny!” psychological French thriller from the creators of Paris Police 1900. When wealthy mother of three Paula (