View source for Backflow/Episode Ratings

Episode ratings for the MBC drama [[Backflow]]

{| class="ratingtable"
!rowspan=2|Date !! rowspan=2|Episode !! colspan=2|TNmS (%) !! colspan=2|Nielsen Korea (%)
|-
! Nationwide !! Seoul !! Nationwide !! Seoul
|-
| 2017-11-13 || 01 || 7.2 (18th) || {{nr|5.9}} || 5.7 || {{nr|7.0}}
|-
| 2017-11-14 || 02 || 7.8 (16th) || 6.5 (16th) || 6.5 (19th) || {{nr|6.4}}
|-
| 2017-11-15 || 03 || 7.5 (14th) || 6.3 (16th) || 6.2 (17th) || {{nr|5.3}}
|-
| 2017-11-16 || 04 || 6.4 || {{nr|6.5}} || 6.3 || {{nr|6.8}}
|-
| 2017-11-17 || 05 || 7.0 (15th) || {{nr|5.3}} || 5.9 (19th) || {{nr|5.6}}
|-
| 2017-11-20 || 06 || 6.5 (17th) || 5.5 (18th) || 6.4 || {{nr|6.1}}
|-
| 2017-11-21 || 07 || 7.5 (12th) || 6.8 (17th) || 6.7 (19th) || 6.2 (20th)
|-
| 2017-11-22 || 08 || 7.6 (14th) || 6.8 (19th) || 6.2 || {{nr|6.2}}
|-
| 2017-11-23 || 09 || 7.2 (17th) || 6.4 (20th) || 6.0 || {{nr|6.7}}
|-
| 2017-11-24 || 10 || 7.9 (14th) || 6.8 (17th) || 6.5 (17th) || 6.3 (19th)
|-
| 2017-11-27 || 11 || 7.5 (17th) || 6.3 (19th) || 6.1 || {{nr|6.3}}
|-
| 2017-11-28 || 12 || 7.5 (14th) || 6.0 (17th) || 5.7 (19th) || {{nr|5.7}}
|-
| 2017-11-29 || 13 || 7.2 (15th) || 6.2 (18th) || 6.9 (16th) || 6.8 (16th)
|-
| 2017-11-30 || 14 || 7.5 (15th) || {{nr|6.1}} || 6.7 (18th) || 6.4 (20th)
|-
| 2017-12-01 || 15 || 7.8 (14th) || 6.8 (14th) || 6.6 (16th) || 6.4 (16th)
|-
| 2017-12-04 || 16 || 6.8 || {{nr|6.1}} || 6.2 || {{nr|7.2}} 
|-
| 2017-12-05 || 17 || 6.8 (15th) || {{nr|5.8}} || 6.7 (16th) || {{nr|6.6}} 
|-
| 2017-12-06 || 18 || 8.1 (14th) || 7.0 (15th) || 6.2 (19th) || {{nr|5.6}} 
|-
| 2017-12-07 || 19 || 8.1 (14th) || 7.3 (16th) || 6.3 || {{nr|6.7}} 
|-
| 2017-12-08 || 20 || 7.8 (17th) || 6.9 (19th) || 6.3 (18th) || {{nr|5.8}}  
|-
| 2017-12-11 || 21 || 6.5 || {{nr|6.6}} || 7.2 || {{nr|7.7}} 
|-
| 2017-12-12 || 22 || 6.9 (15th) || {{nr|6.0}} || 5.6 || {{nr|7.0}} 
|-
| 2017-12-13 || 23 || 8.0 (15th) || 6.7 (19th) || 6.6 (20th) || {{nr|6.3}}
|-
| 2017-12-14 || 24 || 7.9 (15th) || 6.4 (19th) || 6.1 || {{nr|6.0}} 
|-
| 2017-12-15 || 25 || 7.2 (19th) || 5.9 (18th) || 6.3 (20th) || {{nr|6.9}}
|-
| 2017-12-18 || 26 || 7.4 (20th) || {{nr|6.9}} || 6.0 || {{nr|7.3}} 
|-
| 2017-12-19 || 27 || 7.3 (15th) || {{nr|5.6}} || 6.3 || {{nr|7.1}} 
|-
| 2017-12-20 || 28 || 8.0 (14th) || 6.4 (19th) || 6.5 (19th) || {{nr|6.4}} 
|-
| 2017-12-21 || 29 || 8.5 (10th) || 6.6 (12th) || 6.6 (17th) || {{nr|6.1}} 
|-
| 2017-12-22 || 30 || 6.9 (18th) || 5.5 (19th) || 6.3 (19th) || {{nr|6.2}} 
|-
| 2017-12-25 || 31 || 5.9 || {{nr|6.4}} || 4.9 || {{nr|6.9}} 
|-
| 2017-12-26 || 32 || 9.3 (10th) || - || 7.0 (15th) || 6.2 (19th) 
|-
| 2017-12-27 || 33 || 8.7 (13th) || 6.9 (16th) || 6.5 (20th) || {{nr|6.6}} 
|-
| 2017-12-28 || 34 || 8.6 (11th) || 6.4 (16th) || 7.0 (18th) || 6.7 (19th) 
|-
| 2017-12-29 || 35 || 8.3 (15th) || 6.5 (19th) || 6.9 (17th) || 6.2 (20th) 
|-
| 2018-01-01 || 36 || 5.2 || - || 4.5 || {{nr|6.9}} 
|-
| 2018-01-02 || 37 || 7.9 (18th) || - || 6.2  || {{nr|6.4}}  
|-
| 2018-01-03 || 38 || 8.2 (12th) || 5.8 (19th) || 6.9 (18th) || 6.2 (20th) 
|-
| 2018-01-04 || 39 || 8.9 (13th) || - || 7.4 (15th) || 7.2 (17th) 
|-
| 2018-01-05 || 40 || 8.5 (15th) || - || 6.5 (16th) || {{nr|6.3}} 
|-
| 2018-01-08 || 41 || 7.9 (17th) || - || 6.7 || {{nr|6.8}} 
|-
| 2018-01-09 || 42 || 8.2 (12th) || - || 6.8 (20th) || {{nr|6.9}} 
|-
| 2018-01-10 || 43 || 8.6 (10th) || - || 7.2 (15th) || 6.8 (16th) 
|-
| 2018-01-11 || 44 || 8.9 (12th) || - || 7.6 (15th) || 7.2 (18th) 
|-
| 2018-01-12 || 45 || 8.6 (16th) || - || 6.9 (18th) || 6.7 (18th) 
|-
| 2018-01-15 || 46 || 8.4 (14th) || - || 6.8 (20th) || {{nr|6.4}}  
|-
| 2018-01-16 || 47 || 8.5 (12th) || - || 7.1 (18th) || {{nr|6.9}} 
|-
| 2018-01-17 || 48 || 8.6 (9th) || - || 7.4 (12th) || 6.5 (17th) 
|-
| 2018-01-18 || 49 || 9.2 (9th) || - || 7.3 (17th) || 6.5 (19th) 
|-
| 2018-01-19 || 50 || 9.4 (13th) || - || 7.3 (16th) || 6.7 (17th) 
|-
| 2018-01-22 || 51 || 8.5 (14th) || - || 6.6 || {{nr|6.8}} 
|-
| 2018-01-23 || 52 || 9.5 (9th) || - || 7.4 (18th) || 6.5 (19th) 
|-
| 2018-01-24 || 53 || 9.3 (13th) || - || 7.2 (17th) || 6.8 (18th) 
|-
| 2018-01-25 || 54 || 9.8 (11th) || - || 7.3 (18th) || 6.7 (18th) 
|-
| 2018-01-26 || 55 || 9.1 (16th) || - || 7.5 (17th) || 6.5 (19th) 
|-
| 2018-01-29 || 56 || 9.1 (13th) || - || 7.5 (16th) || 6.7 (19th) 
|-
| 2018-01-30 || 57 || 8.7 (8th) || - || 7.4 (13th) || 6.7 (18th) 
|-
| 2018-01-31 || 58 || 8.7 (14th) || - || 7.3 (14th) || 6.4 (17th) 
|-
| 2018-02-01 || 59 || 9.3 (14th) || - || 7.5 (15th) || 7.0 (14th) 
|-
| 2018-02-02 || 60 || 9.7 (13th) || - || 7.4 (17th) || 6.8 (16th) 
|-
| 2018-02-05 || 61 || 9.7 (12th) || - || 7.3 (14th) || 6.5 (18th) 
|-
| 2018-02-06 || 62 || 10.2 (9th) || - || 7.8 (11th) || 6.8 (15th) 
|-
| 2018-02-07 || 63 || 9.7 (12th) || - || 7.7 (15th) || 6.9 (17th) 
|-
| 2018-02-08 || 64 || 10.4 (8th) || - || 7.6 (11th) || 6.9 (11th) 
|-
| 2018-02-09 || 65 || 9.9 (9th) || - || 7.3 (14th) || 6.7 (14th) 
|-
| 2018-02-12 || 66 || 9.1 (15th) || - || 7.7 (16th) || 7.3 (15th) 
|-
| 2018-02-13 || 67 || 9.0 (12th) || - || 7.1 (15th) || 6.5 (16th) 
|-
| 2018-02-14 || 68 || 9.2 (10th) || - || 7.4 (17th) || {{nr|6.8}}
|-
| 2018-02-15 || 69 || 7.5 || - || 5.5 || {{nr|6.6}} 
|-
| 2018-02-16 || 70 || 4.9 || - || 3.5 || {{nr|6.2}} 
|-
| 2018-02-19 || 71 || 9.6 (11th) || - || 6.8 || {{nr|6.2}} 
|-
| 2018-02-20 || 72 || 10.8 (8th) || - || 6.9 (18th) || 6.1 (19th) 
|-
| 2018-02-21 || 73 || 9.8 (9th) || - || 7.8 (11th) || 7.0 (11th) 
|-
| 2018-02-22 || 74 || 10.8 (10th) || - || 7.6 (12th) || 6.8 (13th) 
|-
| 2018-02-23 || 75 || 9.2 (9th) || - || 8.3 (9th) || 7.5 (10th) 
|-
| 2018-02-26 || 76 || 10.3 (9th) || - || 7.4 (19th) || 6.7 (20th) 
|-
| 2018-02-27 || 77 || 7.9 (12th) || - || 7.9 (12th) || 7.4 (16th) 
|-
| 2018-02-28 || 78 || 10.4 (10th) || - || 7.5 (15th) || 6.7 (18th) 
|-
| 2018-03-01 || 79 || 9.8 (11th) || - || 7.0 (18th) || {{nr|6.4}} 
|-
| 2018-03-02 || 80 || 10.5 (11th) || - || 7.6 (17th) || 7.0 (17th) 
|-
| 2018-03-05 || 81 || 10.2 (10th) || - || 7.5 (20th) || 7.0 (19th)
|-
| 2018-03-06 || 82 || 11.1 (7th) || - || 8.2 (10th) || 7.5 (12th)
|-
| 2018-03-07 || 83 || 10.5 (10th) || - || 7.0 (15th) || 6.5 (14th)
|-
| 2018-03-08 || 84 || 10.6 (11th) || - || 7.8 (14th) || 7.2 (13th)
|-
| 2018-03-09 || 85 || 10.7 (7th) || - || 7.7 (15th) || 7.3 (15th)
|-
| 2018-03-12 || 86 || 10.8 (7th) || - || 7.6 (16th) || 6.9 (17th)
|-
| 2018-03-13 || 87 || 11.3 (6th) || - || 7.7 (13th) || 7.1 (13th)
|-
| 2018-03-15 || 88 || 10.9 (10th) || - || 7.9 (15th) || 7.0 (15th)
|-
| 2018-03-16 || 89 || 11.5 (7th) || - || 7.6 (16th) || 6.8 (18th)
|-
| 2018-03-19 || 90 || 10.9 (7th) || - || 7.9 (15th) || 7.0 (18th)
|-
| 2018-03-20 || 91 || 11.7 (6th) || - || 8.0 (12th) || 6.6 (17th)
|-
| 2018-03-21 || 92 || 11.0 (9th) || - || 8.3 (13th) || 7.3 (13th)
|-
| 2018-03-22 || 93 || 11.9 (9th) || - || 8.4 (13th) || 7.4 (10th)
|-
| 2018-03-23 || 94 || 11.9 (7th) || - || 8.4 (12th) || 7.9 (11th)
|-
| 2018-03-26 || 95 || 11.3 (8th) || - || 8.2 (12th) || 7.3 (15th)
|-
| 2018-03-27 || 96 || 11.8 (6th) || - || 8.2 (10th) || 7.4 (11th)
|-
| 2018-03-28 || 97 || 11.2 (6th) || - || 8.7 (7th) || 8.0 (8th)
|-
| 2018-03-29 || 98 || 12.0 (7th) || - || 8.5 (8th) || 7.9 (10th)
|-
| 2018-03-30 || 99 || 12.1 (7th) || - || 8.1 (12th) || 7.5 (12th)
|-
| 2018-04-02 || 100 || 10.7 (8th) || - || 8.8 (11th) || 8.4 (12th)
|-
| 2018-04-03 || 101 || 11.0 (6th) || - || 8.3 (9th) || 7.5 (12th)
|-
| 2018-04-04 || 102 || 10.5 (7th) || - || 8.8 (7th) || 8.0 (9th)
|-
| 2018-04-05 || 103 || 11.7 (5th) || - || 7.9 (11th) || 7.5 (13th)
|-
| 2018-04-06 || 104 || 10.7 (8th) || - || 8.2 (12th) || 7.0 (12th)
|-
| 2018-04-09 || 105 || 10.5 (8th) || - || 9.2 (11th) || 11.6 (4th)
|-
| 2018-04-10 || 106 || 10.4 (7th) || - || 8.7 (9th) || 8.2 (10th)
|-
| 2018-04-11 || 107 || 11.4 (7th) || - || 8.8 (7th) || 7.9 (8th)
|-
| 2018-04-12 || 108 || 11.3 (7th) || - || 8.8 (8th) || 7.9 (8th)
|-
| 2018-04-13 || 109 || 10.2 (9th) || - || 8.2 (12th) || 7.4 (13th)
|-
| 2018-04-16 || 110 || 10.8 (5th) || - || 8.1 (9th) || 7.4 (13th)
|-
| 2018-04-17 || 111 || 11.3 (6th) || - || 8.2 (9th) || 7.5 (10th)
|-
| 2018-04-18 || 112 || 10.8 (7th) || - || 8.5 (7th) || 7.6 (8th)
|-
| 2018-04-19 || 113 || 10.9 (6th) || - || 9.1 (7th) || 8.4 (8th)
|-
| 2018-04-20 || 114 || 12.0 (6th) || - || 9.3 (10th) || 8.5 (12th)
|-
| 2018-04-23 || 115 || 12.1 (6th) || - || 8.8 (10th) || 7.6 (19th)
|-
| 2018-04-23 || 116 || 5.3 || - || 3.7 || {{nr|7.3}}
|-
| 2018-04-24 || 117 || 12.1 (6th) || - || 8.7 (10th) || 7.4 (12th)
|-
| 2018-04-25 || 118 || 11.2 (6th) || - || 9.3 (7th) || 8.6 (7th)
|-
| 2018-04-26 || 119 || 11.0 (6th) || - || 9.4 (7th) || 8.8 (7th)
|-
!colspan=2| Average || 9.3% || - || 7.2% || -
|}

Source: [http://www.TNmS.tv TNmS Media], [http://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=1_1&area=00 Nielsen Korea]

==Notes==
*Episode 88 did not air on March 14 due to a special news broadcast.
*Episodes 115 & 116 aired back-to-back on April 23.

[[Category:Ratings]]