1.
The name of the man that had something going on with Song Hyekyo and Kim Jiwon in the past = Min Yoongi = BTS' Suga's real name
2.
Agus from Descendants of The Sun.
AGUS spelled backwards = SUGA = BTS' Suga.
3.
Goblin's age = 939 years old.
BTS' Suga's date of birth: 9 March 1993
4.
When Goblin asked the Grim Reaper if he could speak English, Grim Reaper replied 'Pardon?'
This was taken from Jungkook and Rapmon's '1 minute English'. The video where Rapmon explains when and where to use the word 'Pardon'.. but I, as the OP, am not really sure about this..
5.
And they also mentioned BTS in the latest episode of Goblin.
Chairman: Buletproof Boys..? What do these boys do?
Secretary: *dances* Why are you shaking my heart! Why are you shaking my heart!
Chairman: Oho! They job is to shake hearts!
Secretary: Yes.. They have been shaking a lot of hearts lately.
+)
The password computer in Descendants of The Sun = 0309 = Suga's birthday.
-Writer-nim.. Two Three?
-Goblin's episode today was really funnyㅋㅋㅋㅋ
-I don't care if the writer is really an Army or not.. I'm already happy by how she mentioned BTS in her dramasㅎㅎㅎ
-I was really shocked when that scene came out..ㅋㅋㅋ
-Wow.. This sounds legit, I'm getting goosebumps..
-Ah! I heard her daughter is a big fan of BTS..
-'Their job is to shake hearts!'ㅋㅋㅋㅋ
-That scene was really unexpectedㅋㅋㅋㅋ
-'Why are you shaking my heart!!!!'
-The secretary looked really funny when he danced to BTS' song.. I thought I was dying from laughterㅋㅋㅋ
-That scene was really funnyㅋㅋㅋ
-The secretary looked really cute today..ㅋㅋㅋ
-Let's go, writer-nim! Two Three!!
-Writer-nim.. If this is really the truth then.. I love you!!
-Hul.. Seems like Suga is her bias!ㅋㅋㅋ
-I love you, writer-nim!! Thank you so much!!!!
-The secretary even danced to the songㅋㅋㅋㅋ
-Two three..??
-I love you writer-nim..ㅠㅠ Goblin is a really good drama..ㅠㅠ
-I love the writer!!!
-I'm really proud of my boys..ㅋㅋㅋ