Episode #1.1 - S1-E1
Other mistake: At the beach, the detective is worried about the tide coming in, yet the subsequent tent to protect the scene is 20 feet beyond the high tide debris line.
Broadchurch (2013)
1 other mistake in season 1 - chronological order
Starring: David Tennant, Olivia Colman, Jodie Whittaker, Andrew Buchan
Episode #1.2 - S1-E2
Character mistake: In the incident room Danny's height is written as 4ft 8inches / 112 cm. 4'8" is 142cm. (00:06:48)
DS Ellie Miller: Most people have a moral compass.
DI Alec Hardy: Compasses break.