Take This Waltz focuses on Margot (Michelle Williams), a freelance writer married to a cookbook author (Seth Rogen) but who develops feelings for a neighbor (Luke Kirby), an artist and rickshaw driver. Waltz feels like an avant-garde performance devoted to women on the verge. What happens to women who long for more than life has given them but then encounter an opportunity to grab hold of something more?  

What starts out as a promising sci-fi thriller about romantically linked biochemists (Adrien Brody and Sarah Polley) loses steam in an underwhelming third-act climax evidently affected by budgetary limits. There's a dash of 'Rosemary's Baby' in a film that wants to present more of a horrifying scientific moral dilemma than it's able to deliver. Grade: C-plus.