Conversation so far:
when does mickey come back in season 7
In episode 10 of Shameless season 2, Ian is kidnapped and taken to a football field as Mickey finally appears and asks Ian to escape with him to Mexico.
do ian and mickey escape to mexico together
Ian changes his mind and says goodbye to Mickey, leaving Mickey a substantial amount of money from his savings account; Mickey is seen to be entering Mexico.
do ian and mickey reunite after saying goodbye at the mexican border
In Shameless season 9, Ian is encarcerated and discovers that Mickey is his bunk mate.

Question: why did the actor leave the series
Self-contained rewrite: why did cameron monaghan decide to leave shameless