Plot

Do Min-Joon is an alien who landed on Earth 400 years ago during the Joseon Dynasty period. Do Min-Joon possesses a near perfect appearance and enhanced physical abilities involving his vision, hearing and speed.

Do Min-Joon holds a cynical view to human beings, but he falls in love with actress Cheon Song-Yi.

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Notes

1. "You Who Came From the Stars" takes over the Wednesday & Thursday 21:55 time slot previously occupied by "The Heirs"
2. Early Korean working title was "Byeoleseo On Namja" (literally "Man from the Stars").

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Cast

Gianna Jun	Kim Soo-Hyun	Park Hae-Jin	Yoo In-Na
Cheon Song-Yi	Do Min-Joon	Lee Whi-Kyung	Yoo Se-Mi

Additional Cast Members:

• Na Young-Hee - Yang Mi-Yeon (Song-Yi's mother)
• Eom Hyo-Seop - Cheon Min-Koo (Song-Yi's father)
• Ahn Jae-Hyeon - Cheon Yoon-Jae (Song-Yi's younger brother)
• Hong Jin-Kyung - President Hong (comic book store owner)
• Kim Chang-Wan - Jang Young-Mok (Min-Joon's friend)
• Shin Sung-Rok - Lee Jae-Kyung (Whi-Kyung's older brother)
• Lee Jeong-Kil - Lee Beom-Joong (Whi-Kyung's father)
• Lee Il-Hwa - Han Sun-Young (Se-Mi's mother)
• Oh Sang-Jin - Yoo Seok (Se-Mi's older brother)
• Jo Hee-Bong - President Ahn
• Jo Seung-Hyun - Lee Whi-Kyung (young)
• Yu In-Young - Han Yoo-Ra (ep.2)

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sources:

asianwiki

dramabeans

SBS