Goofs

When Kaylie starts recording her video, she says the time is 4:15PM. Two minutes later when Michael calls her, she says "Could you try and call on the hour? It's about seven past."

When Kaylie is showing the pictures of past murders, her red nail polish is peeled off when she's showing the first pictures, but when she moves on to the next pictures, her red nail polish is fresh.

At 46:00, Tim takes the sheet off of the dog cage. After the flashbacks (that take no time in "real" time), the cover is back on the cage.

In her chronology of owners of the glass, Kaylie mentions Robert Clancy who acquired the glass in 1864. She mentions that while attending the University of Connecticut, he was known as "The Whale". The University of Connecticut opened as Storrs Agricultural College in 1881 and did not become the University of Connecticut until 1939.

When giving the story of the mirror, Kayleigh says its known history begins with Philip Lasser, 17th Earl of Leicester in 1754 who was killed by the mirror in 1755. In 1754, the title of Earl of Leicester was held by Thomas Coke, who was 1st Earl from 1744 to 1759. There has been no Earl of Leicester with the surname Lasser. Two Earls were named Philip but both had the surname Sidney. There has never been a 17th Earl of Leicester; the farthest the title has passed was for the seventh Earl.

In the moving scenes when the mirror is placed in the home office, there is a Dell 2013 model flat-screen monitor on the desk. These events were supposed to take place in 2002. Flat-screen monitors were a rarity and were much smaller in size.

When Kaylie is giving the history of the mirror, she says that it was thought to have been destroyed in Sherman's March to the Sea in 1865. Sherman's march occurred in 1864.