Season 1 ABC , 1998 - 1999 Watch now Season 2 ABC , 1999 - 2000 Watch now Season 3 ABC , 2000 - 2001 Watch now Season 4 ABC , 2001 - 2002 Watch now Season 5 ABC , 2002 - 2003 Watch now Season 6 ABC , 2004 Watch now Season 7 ABC , 2005 Season 8 ABC , 2005 - 2007 Watch now Season 9 The CW , 2013 Watch now Season 10 The CW , 2014 Watch now Season 11 The CW , 2015 Watch now Season 12 The CW , 2016 Watch now Season 13 The CW , 2017 Watch now Season 14 The CW , 2018 Season 15 The CW , 2019 Season 16 The CW , 2020 Season 17 The CW , 2021 Season 18 The CW , 2021 - 2022 Season 19 The CW , 2022 - 2023 Season 20 The CW , 2023 - 2024 Season 21 The CW , 2024
, 1998 - 1999
, 1999 - 2000
, 2000 - 2001
, 2001 - 2002
, 2002 - 2003
, 2005 - 2007
