Jeon So-min was offered the lead female role but declined.[9]
The script reading was held on April 28, 2018.[10]
On August 26, 2018, it was announced that lead actor Kim Jung-hyun dropped out of the cast due to health concerns. His agency revealed that there would be no replacement for him and the production crew was working on revising the script for his character to naturally fall out of the story.[11][12] He officially finished filming on September 3.[13]
In July 2018, Kim Jung-Hyun was involved in a controversy over his "emotionless" behavior during a press conference.[14][unreliable source?] His agency, O& Entertainment, defended him by stating that "Because [Kim Jung Hyun] is spending a lot of time thinking about his character, immersing himself into the life of someone terminally ill every day, he had difficulty maintaining his [physical and mental] condition, and unintentionally made a mistake."[15][better source needed] In 2021, Kim released an apology letter regarding his behavior during that period, after a local tabloid claimed that he allegedly requested to remove several scenes that included physical contact with his then co-star.[16]
Episodes did not air on August 15 due to the broadcast of the 2018 Asian Games: Soccer Men's Tournament - Preliminary Group E match between South Korean and Bahrain.
Episodes did not air on August 23 due to the coverage of the 2018 Asian Games.
^ abIn order to circumvent Korean laws that prevent commercial breaks in the middle of an episode, what would previously have been aired as single 70 minute episodes are now being repackaged as two 35 minute episodes, with two episodes being shown each night with a commercial break between the two.[1]
^Due to unforeseen circumstances, Imagine Asia opted out of co-producing Time and it was replaced by Silkwood, a production company founded by ex-KBS business reporter Kim Seung-jo.
^Jung, Yu-jin (December 31, 2018). 소지섭 ‘데뷔 23년 만에 첫 대상’(mbc연기대상)[포토엔HD] [So Ji-sub Soo'First Debut in 23 Years' (mbc Drama Awards)[Photo and HD]]. Newsen (in Korean). Archived from the original on December 31, 2018. Retrieved June 5, 2020 – via Naver.