ATEEZ’s San is heading back to “Running Man,” and this time the show is fully leaning into his beloved nickname. On September 6, SBS dropped a preview for the upcoming episode featuring San alongside actress Han Ji Eun, and the “Duke of the North” theme delivers exactly the chaotic fun fans were hoping for.

The teaser opens with HaHa and Yang Se Chan dressed up as rival Northern dukes, only for San to make a dramatic entrance that leaves HaHa visibly panicked. Staying in character, San recites an over-the-top romantic line straight out of a fantasy manhwa, then breaks into his viral choreography from ATEEZ’s hit track “BAD,” drawing an excited reaction from cast member Ji Suk Jin. Han Ji Eun later joins him for the dance, while the cast playfully teases her about her Italian language skills. San also gets in a lighthearted jab at HaHa’s satoori impression, calling it “kind of counterfeit.”

Duke of the North: Episode Details

Detail	Information
Show	Running Man (SBS)
Guests	San (ATEEZ), Han Ji Eun
Theme	“Duke of the North”
Air Date	September 13, 2026
Air Time	6:10 p.m. KST

San’s “Duke of the North” nickname has followed him since his early ATEEZ days, becoming a signature part of his fan-facing persona in the broader world of K-pop idol culture, where nicknames often shape how artists are marketed and remembered.

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