Several hours ago, 'Running Man' posted on its official Instagram a picture showing all of the cast members standing next to the BTS members. The 'Running Man' crew are dressed in matching pink shirts while BTS are dressed in all black--what could possibly be going on here? The possibilities are endless! The picture was posted with the words, "RM Ep.300 special < 7 vs 300 > is still filming now in Seoul. #BangtanBoys are joining RM as special guests today. RM members & #BTS is doing a mission related to number '300' now. RM Ep.300 on May 22 at 6:25pm KST on #SBS."

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You can catch this special 300th 'Running Man' episode featuring BTS when it airs this coming May 22 at 6:25 p.m. (KST)!