Jimmy McGovern’s abuse drama ‘Unforgivable’ is a hard-hitting watch; ‘Bookish’ is cosy crime with depth; ‘Inside the Cult of the Jesus Army’ follows the rise of a British evangelical church; Keeley Hawes plays a retired hitwoman in daft action caper ‘The Assassin’; Jacob Elordi and Ciarán Hinds star in a ★★★★★ ‘The Narrow Road to the Deep North’; Lena Dunham’s ‘Too Much’ proves her powers of observation are undiminished — reviews by Rebecca Nicholson, Róisín Lanigan & Dan Einav