The additions of Daniel are three chapters not found in the Hebrew/Aramaic text of Daniel. The text of these chapters is found in the Koine Greek Septuagint, the earliest Old Greek translation.
The three chapters are as follows.
Daniel 3:24–90 (in the Greek Translation) are removed from the Protestant canon after verse 23 (v. 24 becomes v. 91), within the Fiery Furnace episode. When Shadrach, Meshach, and Abednego are thrown into a furnace for declining to worship an idol, they are rescued by an angel and sing a song of worship.[1] In some Greek Bibles, the Prayer and the Song appear in an appendix to the book of Psalms.[2]
before Daniel 1:1, a prologue in early Greek manuscripts; chapter 13 in the Vulgate. This episode, along with Bel and the Dragon, is one of "the two earliest examples" of a detective story, according to Christopher Booker. In it, two men attempt to coerce a young woman into having sexual relations with them through blackmail, but are foiled under close questioning by Daniel.[3]
after Daniel 12:13 in Greek, an epilogue; chapter 14 in the Vulgate. Daniel's detective work reveals that a brass idol believed to miraculously consume sacrifices is in fact a front for a corrupt priesthood which is stealing the offerings.