The tag cop appears in these 7 comics:

• 36: (8/25/2012) A foolproof plan (Tags: mike, chris, cop, time-machine)
• 55: (01/05/2013) How Does This Time Travel Stuff Work, Anyway? (Tags: mike, cop, ashley, time-machine)
• 76: (06/01/2013) Just trying to be nice (Tags: mike, time-machine, cop)
• 104: (12/14/2013) Classic car (Tags: mike, cop, bob, chris, time-machine)
• 114: (02/22/2014) Professor Jan Itor (Tags: ashley, mike, chris, dale, cop)
• 176: (05/02/2015) Rescue 911 (Tags: mike, cop)
• 305: (07/06/2019) Controlled burn (Tags: mike, cop, carlos)