I will second X-Files as its just awesome. Gets a little thin about season 5 or 6 but the first couple of seasons were awesome.

My only other show I'll mention is...

Iron Chef Japan - If you get FLN, it plays in the evening and its just superbly funny and entertaining. The American version is way too serious.

Warehouse 13 has also been interesting, it feels like a cross between Eerie Indiana and X-Files. Interesting show and I'm just kinda getting into ti.

Burn Notice is another cool show with the first half of the third season just ending and the second airing in the winter. The first two seasons are just great and its got Bruce Campbell in it.