On the October 18 airing of 'Running Man,' the actress introduced her handsome younger brother. He had joined her on the show specially for the mission on that given day which was to 'Find the Memory's Treasure.' For her treasure, Song Ji Hyo had picked ancient 'Bioman' VCR's, which she and her brother used to watch as little kids. 

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The two siblings pranced around singing the theme song to 'Bioman,' enjoying themselves as they had back in their carefree childhood. Afterwards, when Song Ji Hyo asked her brother to tell a story about their bygone youth, he abruptly replied, "But she hit me a lot." Song Ji Hyo only gave an awkward laughter and put her arm around her brother as if she was saying sorry. Awwwwww.