Bonus episodes included with the BD/DVD. The first episode consists of "Miwaku no Farosu" (Alluring Pharos) and "Sanshimai OL Terumae Satsujin Jiken" (The Three Sisters of Thermae Romae Murder Case). The second episode consists of "Subesube ni Naritai" (I Want to Have Smooth Skin) and "Hitasura Suberitai" (I Just Want to Slip).
Anix is the best site to watch
Thermae Romae SUB online, or you can even watch
Thermae Romae DUB in HD quality. You can also find
DLE anime on Anix website.