 In February 2011 , McGregor announced his departure from Neighbours and a Herald Sun reporter stated that he would film his final scenes in April . On screen , his character was seen exposing corruption within the local police force and then receiving threats from some of his colleagues . McGregor later explained to a Press Association reporter that Mark 's exit storyline would not be a happy one , as he is forced out of Ramsay Street . Mark is asked to enter a witness protection program and the night before he leaves , he realises he is still in love with his ex @-@ girlfriend , Kate ( Brewer ) . McGregor told Sarah Ellis of Inside Soap " He hasn 't been able to tell Kate that he 's leaving before now – but he just can 't say goodbye , and asks her to come along with him . It 's such a very big ask , so of course she has to give it a lot of thought . " 
