Emmerdale has cast Death in Paradise actor Chelsea Edge as a new police officer who will investigate the death of Dr Caitlin Todd. Ramsden appears for the first time in Tuesday's episode, arresting Charity and Sarah for murder as she investigates the possibility of foul play in Dr Todd's death. What to Read Next"Ramsden means business and she'll stop at nothing to get to the truth," said our Emmerdale insider. Emmerdale viewers know that during Sunday's episode it was revealed that Sarah killed Dr Todd after witnessing a confrontation between Charity and the villain. An angry Sarah shoved Dr Todd, who fell and hit her head on a table, dying from the injury.