[3] In addition, invited guests will visit each historical site to make the Korean history exploration more enriching and enjoyable.

[12] + San Diego (United States)(20 April) + Baden-Württemberg & Berlin (Germany)(18 May – 25 May) + Jerusalem & Dead Sea (Israel-Palestine)(29 June, 13 July) + Gibraltar(British Overseas Territories)(3 August) + Morocco & Portugal(10 August) + Lake Bled (Slovenia)(14 September) In the ratings below, the highest rating for the show will be in red and the lowest rating for the show will be in blue for each season or year.

On 11 June 2018, the production crew of MBC "선을 넘는 녀석들" wrote in the official Instagram that some Jordanian-Israel-Palestine editions broadcast on Friday, 8 June, have pointed out that "the part that used the image of Muhammad as a prophet of Islam and the part that used the rock dome together with the flag of a certain country".

The production crew has issued an official apology, in both Korean and English version, for telling people of particular religions and views.

[129] On 30 December 2020, there was a report that Seol Min-seok's thesis on 'A Study on the Ideological Controversy Appearing in Textbooks of Modern and Contemporary Korean History' for which he received his master's degree at the Yonsei University Graduate School of Education in 2010 was 52% plagiarised.

Seol admit that in his research in writing the thesis, he neglected citations and footnotes in the process of referencing other papers.