All data obtained from @SonOfTheBronx on Twitter:
Son Of The Bronx/Programming Insider

Oct 28th, 2017 (Samurai Jack S5 Marathon)

Time
Show
Ratings
A18-49
11:00am Samurai Jack 745,000 439,000
11:30am 675,000 376,000
12:00am 678,000 346,000
12:30am 618,000 328,000
1:00am 562,000 300,000
1:30am 569,000 325,000
2:00am 559,000 331,000
2:30am 496,000 288,000
3:00am 421,000 244,000
3:00am 447,000 267,000


comparison

Oct 29th, 2016 (IBO Marathon)

Time
Show
Ratings
A18-49
12:00am Gundam: IBO 1,293,000 802,000
12:30am 995,000 613,000
1:00am 878,000 530,000
1:30am 860,000 516,000
2:00am 769,000 462,000
2:30am 674,000 409,000
11:30am 492,000 326,000

If you want more data, you can check my spreadsheet here. That will have further data including per year difference and A18-49 differences. Any mistakes can be notified on my twitter @AmbientVirus

Let us know what you think in the comments below about the ratings.