Season 1
Pilot (8 April, 1990) A+
Episode 1 (12 April, 1990) A
Episode 2 (19 April, 1990) A+
Episode 3 (26 April, 1990) A-
Episode 4 (3 May, 1990) B+
Episode 5 (10 May, 1990) A
Episode 6 (17 May, 1990) A-
Episode 7 (23 May, 1990) A

Season 2
Episode 8 (30 September, 1990) A+
Episode 9 (6 October, 1990) A
Episode 10 (13 October, 1990) A-
Episode 11 (20 October, 1990) B+
Episode 12 (27 October, 1990) A-
Episode 13 (3 November, 1990) A
Episode 14 (10 November, 1990) A+
Episode 15 (17 November, 1990) A-
Episode 16 (1 December, 1990) A
Episode 17 (8 December, 1990) B-
Episode 18 (15 December, 1990) C
Episode 19 (12 January, 1991) C-
Episode 20 (19 January, 1991) C+
Episode 21 (2 February, 1991) C-
Episode 22 (9 February, 1991) C-
Episode 23 (16 February, 1991) B
Episode 24 (28 March, 1991) B-
Episode 25 (4 April, 1991) B+
Episode 26 (11 April, 1991) B
Episode 27 (18 April, 1991) A
Episode 28 (10 June, 1991) B+
Episode 29 (10 June, 1991) A+

Twin Peaks: Fire Walk with Me (16 May, 1992)

Season 3 - "The Return"
Part 1 (21 May, 2017) A
Part 2 (21 May, 2017) A-
Part 3 (21 May, 2017) A+
Part 4 (21 May, 2017) B+
Part 5 (4 June, 2017) A
Part 6 (11 June, 2017) A
Part 7 (18 June, 2017) A-
Part 8 (25 June, 2017) A+
Part 9 (9 July, 2017) B+
Part 10 (16 July, 2017) A
Part 11 (23 July, 2017) A+
Part 12 (30 July, 2017) B+
Part 13 (6 August, 2017) A-
Part 14 (13 August, 2017) A+
Part 15 (20 August, 2017) A-
Part 16 (27 August, 2017) A+
Part 17 (3 September, 2017) A+
Part 18 (3 September, 2017) A+

Errata (coming soon)
Pilot - International version
Twin Peaks: The Missing Pieces