When Mr. Eko first says his name, he says it as one word. Even in the subtitles it appears as "Mistereko". When Sawyer replies, "Mr.Eko?", Mr. Eko grins and says "Yes".
One of two LOST episodes that use the show's name as part of the title. The other is ...In Translation (2005).
The Seoul Gateway Hotel featured in this episode was really the Royal Garden at Waikiki in Honolulu.