| Episode | Channel | Broadcast | Viewers | Share | Pos | |
| Part Four | |  |  | Fri 16 Oct 1981 6:00pm PDT | | | | |
| Part Four | | | | Wed 9 Jun 1982 6:00pm PDT | | | | |
| Part Four | | | | Wed 23 Feb 1983 6:00pm PST | | | | |
| Part Four | | | | Thu 20 Oct 1983 7:30pm PDT | | | | |
| Part Four | | | | Thu 23 Aug 1984 7:30pm PDT | | | | |
| Part Four | | | | Fri 28 Mar 1986 7:30pm PST | | | | |
| Part Four | | | | Wed 6 Apr 1988 7:00pm PDT | | | | |
| Part Four | | | | Fri 24 Nov 1989 7:00pm PST | | | | |
| Part Four | | | | Tue 28 May 1991 7:00pm PDT | | | | |
| Part Four | | | | Mon 18 Oct 1999 12:15am PDT | | | | |
| Part Four | |  | | Sun 2 Apr 2000 1:15am EST | | | | |
| Part Four | |  | | Sat 27 May 2000 11:25pm EDT | | | | |
| Part Four | |  | | Fri 19 Jan 2001 11:30pm CST | | | | |
| Part Four | |  | | Sat 20 Jan 2001 10:25pm MST | | | | |
| Part Four | | | | Sat 27 Jan 2001 12:55am MST | | | | |
| Part Four | |  | | Sun 17 Jun 2001 12:00am EDT | | | | |
| Part Four | |  | | Sat 30 Jun 2001 10:30pm CDT | | | | |
| Part Four | |  | | Fri 10 Aug 2001 12:30am EDT | | | | |
| Part Four | | | | Sun 12 Aug 2001 12:30am EDT | | | | |
| Part Four | |  | | Sat 25 Aug 2001 7:30pm PDT | | | | |
| Part Four | | | | Sun 26 Aug 2001 1:00am PDT | | | | |
| Part Four | |  | | Fri 7 Sep 2001 10:30pm CDT | | | |  |
| Part Four | |  | | Sat 20 Oct 2001 11:00pm EDT | | | | |
| Part Four | |  | | Sat 22 Dec 2001 11:30pm CST | | | | |
| Part Four | | | | Sun 23 Dec 2001 5:30am CST | | | | |
| Part Four | |  | | Sat 7 Sep 2002 11:00pm MDT | | | | |
| Part Four | | | | Sat 29 Mar 2003 11:00pm EST | | | | |
| Part Four | |  | | Sat 28 Jun 2003 11:40pm CDT | | | | |
| Part Four | | | | Sun 4 Jul 2004 12:00am CDT | | | | |
| Part Four | | | | Sat 3 May 2008 10:55pm EDT | | | | |
| Part Four | | | | Sat 13 Sep 2014 11:30pm PDT | | | | |
| Part Four | | | | Sun 14 Sep 2014 4:30am PDT | | | | |
| Part Four | |  | | Mon 16 Mar 2015 8:30pm EDT | | | | |
| Part Four | |  | | Mon 16 Mar 2015 8:30pm EDT | | | | |
| Part Four | | | | Sat 13 Feb 2016 7:30pm EST | | | | |
| Part Four | | | | Mon 22 Feb 2016 11:30pm EST | | | | |
| Part Four | | | | Wed 25 Jan 2017 7:00pm EST | | | | |
| Part Four | | | | Wed 6 Dec 2017 7:30pm EST | | | | |
| Part Four | | | | Sun 4 Mar 2018 5:30pm EST | | | | |
| Part Four | | | | Sat 21 Apr 2018 7:00pm EDT | | | | |
| Part Four | |  | | Sat 29 Sep 2018 10:00pm CDT | | | | |
| Part Four | | | | Mon 29 Oct 2018 8:00pm EDT | | | | |
| Part Four | | | | Sat 27 Apr 2019 10:00pm CDT | | | | |
| Part Four | | | | Sun 2 Jun 2019 8:30pm EDT | | | | |
| Part Four | | | | Mon 16 Sep 2019 8:30pm EDT | | | | |
| Part Four | | | | Sat 30 Nov 2019 11:30pm PST | | | | |
| Part Four | | | | Sun 1 Dec 2019 4:30am PST | | | | |
| Part Four | | | | Sat 4 Jul 2020 6:30pm EDT | | | | |
| Part Four | | | | Thu 6 Aug 2020 8:00pm EDT | | | | |
| Part Four | | | | Thu 20 May 2021 8:30pm EDT | | | | |
| Part Four | | | | Sat 16 Oct 2021 7:30pm EDT | | | | |
| Part Four | | | | Sun 21 Nov 2021 7:30pm EST | | | | |
| Part Four | | | | Thu 17 Feb 2022 8:30pm EST | | | | |
