Catherine Shoard and Henry Barnes join Xan Brooks for our weekly round-up of the big cinema releases. This week the team watch Scarlett Johansson amp up her noggin in Luc Besson's pop science thriller Lucy; Daniel Radcliffe damp down the laughs in relationship comedy What If; the Dardennes brothers employ Marion Cotillard for Two Days, One Night, a drama about social justice in the job market; and a bunch of indie darlings warble around sunny Glasgow in Belle and Sebastian singer Stuart Murdoch's God Help the Girl
• This is the audio-only version of this week's Guardian Film Show
