The death dream Micki and Ryan are trapped in consists of flashbacks from seven previous episodes: The Inheritance, Cupid's Quiver, Scarecrow, Tattoo, Doctor Jack, Tales of the Undead, and The Baron's Bride. Jack also mentions sending Lewis back to Hell before, which happened in Hellowe'en. No flashback is shown to that episode.
The Coptic jar is never confirmed as an antique, and it isn't listed in the manifest. If it's not an antique, it is the first non-cursed object to appear on the show.