Season 4 consists of these episodes:
1 "Contempt of Court"
2 "Amen Send Money"
3 "Death and the Lady"
4 "The Big Thaw"
5 "Child's Play"
6 "God's Work"
7 "Missing Hours"
8 "Like a Hurricane"
9 "The Rising Sun of Death"
10 "Love at First Sight"
11 "Rock and a Hard Place"
12 "The Cows of October"
13 "Vote of Confidence"
14 "Baseballs of Death"
15 "Indian Wars"
16 "Honor Among Thieves?"
17 "Hell Hath No Fury"
18 "Badge of Dishonor"
19 "Blood and Roses"
20 "A Bullet for Crockett"
21 "Deliver Us from Evil"
22 "Mirror Image"
Did the episode you are referring to go by another name, possibly?
I see the works of gifted hands that grace this strange and wondrous land

Regarding Rico's shot yes it can be done but it's a "rare" shot not to mention very hard with a snub nose that Rico carries
And cops have to practice low light shooting in order for night time.