Gary is returning to SBS "Running Man," an official from the programme said Tuesday.
SBS said that Gary would appear as a special guest on the 29th.
"There will be dramatic twist and great secret added to the episode," the official said.
"The episode will be airing in two weeks, so we can't give you any further details about it."
His sudden appearance was even a secret to other "Running Man" members before filming the episode.