"Terry's tasks while Holt is gone" is as follows; 1. Clean out evidence room, 2. Step up community service, 3. FDNY/NYPD joint exercise, 4. CPR certification refresher, 5. First aid certification refresher, 6. Digitalize pre-1979 mug shots, 7. Volunteer at Juvenile Detention Program, 8. Haz Mat training, 9. Testing of radio & emergency equipment, 10. Douglass Street house board, 11. Clear report back log, 12. Tactical shotgun re-certification, 13. Advanced rifle operator course, 14. Park Slope neighborhood watch, 15. Precinct-wide flu shots/mumps vaccination, 16. Arson & explosive investigation course, 17. Get new vending machine for break room, 18. Abduction response team training 19. Computer search & seizure course, 20. Clean up locker room, 21. Dispose of pre-1990 interrogation footage, 22. Complete 675 forms, 23. File J90 reports with DA, 24. Coordinate rapid response with 79th precinct and added later is 25. Fix Bell.
Charles (Joe Lo Truglio) wears all black to mourn the loss of his dog, Jason. He also does this in S1E22 when he and his fiancée Vivian break off their engagement.
At Captain Holt's house, when Amy leaves, we can see on the wall, a replica of one of Michelangelo's Ignudi painted in the the Sistine Chapel.