Question: how many episodes are there in last man on earth season 4
Answer: Season Episodes Originally aired First aired Last aired 13 March 1 , 2015 ( 2015 - 03 - 01 ) May 3 , 2015 ( 2015 - 05 - 03 ) 18 September 27 , 2015 ( 2015 - 09 - 27 ) May 15 , 2016 ( 2016 - 05 - 15 ) 18 September 25 , 2016 ( 2016 - 09 - 25 ) May 7 , 2017 ( 2017 - 05 - 07 ) 18 October 1 , 2017 ( 2017 - 10 - 01 ) May 6 , 2018 ( 2018 - 05 - 06 )