Complex sentence: Richie and Wallace departed on-screen on 22 May 2015 before returning for a short stint from 26 December 2015 to 25 January 2016, before appearing in the six-part drama spin-off series,', airing from 14 May 2017.
Split into simpler sentences: Richie and Wallace departed on-screen on 22 May 2015 before returning for a short stint from 26 December 2015 to 25 January 2016. They later filmed a follow up to Kat and Alfie's story, a six-part drama series titled', airing from 14 May 2017.