Hi, you can download subtitles for almost all american shows from the gom tv website:
http://gom.gomtv.com/jmdb/index.html
These days some torrents ship with Korean subtitles included as well I noticed, but I don't know how to specifically search for that. If you use gom player you can adjust the timing of the subtitles by default with < and > in case they are out of sync. The Korean version of gom player actually tries to automatically download subtitles for the file you open and from what I heard it usually gets the correct ones.
