Their characters were replaced by PCs Luke Ashton and Sam Harker, with actors Scott Neal and Matthew Crompton appearing as guest actors on a number of times, both of the actor's most recent guest stints coming the previous year. The series also saw DC Tom Proctor, introduced into CID. Actor Gregory Donaldson revealed in a 2018 interview on The Bill Podcast that the role came after impressing producers in a guest stint earlier in the series, portraying burglary suspect Andy Melford in an hour-long special, "In the Dark".
Luke Ashton and Sam Harker took over as PCs from their original characters. Actors Scott Neal and Matthew Crompton appeared as guest stars on various episodes. Both of these actors' most recent appearances were last year. The series also included DC Tom Proctor, introduced into CID. Actor Gregory Donaldson mentioned in a 2018 interview on The Bill Podcast that he was cast after impressing producers during an earlier guest appearance where he portrayed burglary suspect Andy Melford in "In the Dark."