Last Tango in Halifax will crossover with Happy Valley as Sarah Lancashire’s Sergeant Cawood returns
FANS of Happy Valley are in for a treat on Sunday thanks to a Sergeant Cawood-crossover in Last Tango in Halifax. Actress Sarah Lancashire plays Caroline in the BBC Drama and also stars as Sergeant Catherine Cawood in showrunner Sally Wainright's other series Happy Valley, which hasn't been on screen since 2016.