Heroes

Seasons
	1	2	3	4
0	8.3
1	8.3	7.8	7.8	7.6
2	8.2	7.6	7.6	7.4
3	8.2	7.6	7.6	7.2
4	8.2	7.6	7.5	7.5
5	8.2	7.7	7.4	7.5
6	7.9	7.4	7.5	7.2
7	7.9	7.9	7.3	7.6
8	8.0	8.0	7.7	7.5
9	8.7	8.2	7.4	7.4
10	8.4	7.7	7.5	7.3
11	8.5	8.0	7.5	7.3
12	8.1		7.9	7.0
13	8.0		7.6	6.9
14	8.2		7.7	7.0
15	8.1		7.5	6.8
16	8.5		7.2	7.4
17	9.0		7.1	7.6
18	8.7		7.2	7.7
19	8.5		7.5
20	9.1		7.9
21	8.3		7.3
22	8.6		7.5
23	8.5		7.2
24			7.5
25			7.6

Source ratings: https://www.imdb.com/interfaces/
Source images: https://TheTVDB.com