Pemeran Desperate Mr. X

Kwon Sang Woo

as Yoon Dae Wook

Pemeran Utama

Sung Dong Il

as Heo Joon

Pemeran Utama

Im Se Mi (임세미)

as Kang Mi Jin

Pemeran Utama

Shin Hyun Soo (신현수)

as Andy Jung

Pemeran Pembantu

Lee Yi Kyung (이이경)

as Woo Jin

Pemeran Pembantu

Park Jin Joo (박진주)

as Assistant Manager Kim

Pemeran Pembantu

Ryu Yeon Seok

as Seok Ho

Pemeran Pembantu

Song Yoo Ha

as Section Chief Lee (Ep. 1)

Bintang Tamu

Lee Seok Jun

as Managing Director Park (Ep. 1)

Bintang Tamu

Jo Han Chul

as Department Manager Kim (Ep. 1)

Bintang Tamu

Park Jung In

as [Heo Joon's clinic nurse] (Ep. 1)

Bintang Tamu

Kim Sung Oh

as Seung Il (Ep. 2-3)

Bintang Tamu

Kim Gi Bang

as Myung Soo (Ep. 2-3)

Bintang Tamu

Kim Han Joon

as Seong Uk (Ep. 2-3)

Bintang Tamu

Kim Eun June

as [Interviewer] (Ep. 3)

Bintang Tamu

Lee Kwang Soo

Bintang Tamu

Kim Jung Hoon

Sutradara

Kwak Kyung Yoon

Screenwriter