Season 0 of The First 48 premiered on 2011-05-11.

Season 1 of The First 48 premiered on 2004-06-03.

Season 2 of The First 48 premiered on 2005-01-06.

Season 3

1

.

2005

.

12 Episodes

Season 3 of The First 48 premiered on 2005-10-05.

Season 4

0.5

.

2006

.

19 Episodes

Season 4 of The First 48 premiered on 2006-06-14.

Season 5 of The First 48 premiered on 2007-01-18.

Season 6 of The First 48 premiered on 2007-07-11.

Season 7 of The First 48 premiered on 2008-01-09.

Season 8 of The First 48 premiered on 2009-01-01.

Season 9 of The First 48 premiered on 2009-06-16.

Season 10 of The First 48 premiered on 2010-01-14.

Season 11 of The First 48 premiered on 2010-09-30.

Season 12 of The First 48 premiered on 2011-12-08.

Season 13 of The First 48 premiered on 2013-03-06.

Season 14 of The First 48 premiered on 2014-06-17.

Season 15 of The First 48 premiered on 2015-11-05.

Season 16

6.1

.

2016

.

22 Episodes

Season 16 of The First 48 premiered on 2016-12-01.

Season 17 of The First 48 premiered on 2017-10-19.

Season 18

10

.

2019

.

18 Episodes

Season 18 of The First 48 premiered on 2019-01-10.

Season 19 of The First 48 premiered on 2020-01-01.

Season 20

1

.

2021

.

23 Episodes

Season 20 of The First 48 premiered on 2021-10-20.

Season 21 of The First 48 premiered on 2022-11-02.

Season 22 of The First 48 premiered on 2023-09-20.

Season 23 of The First 48 premiered on 2024-01-01.

Season 24 of The First 48 premiered on 2024-05-29.

Season 25 of The First 48 premiered on 2025-01-01.

Season 26 of The First 48 premiered on 2024-05-30.

Season 27 of The First 48 premiered on 2025-01-01.

Season 28 of The First 48 premiered on 2025-06-12.