Continuity: When Paige follows Phoebe into the kitchen and is trying to convince her that she is telling the truth, Phoebe's right earring is missing in the shots showing both women, but it is there when the shot changes to close ups of Phoebe. It is an awfully large earring to be hidden by her hair in the two-shot.

Continuity: Although the actress has changed, Piper's doctor appears to be the same character as Eva, the shuvani, Paige even says, 'we saved her shuvani tribe'. But throughout this episode they call her Eve.

Plot hole: In 'Centennial Charmed' Paige orbs to another reality where she loses all her powers. Leo tells her the this is because she was never called as a witch in this world, but Paige had most of her powers before she was called because of her whitelighter blood, so she should retain these. Leo says that Paige has assumed the life of this reality's Paige, but then adds "...or at least the life she would have lived if she hadn't been killed". If alternate Paige had lived she would have had Whitelighter powers, even if she didn't know about them, so our Paige should also have them.

Continuity: Paige's headstone reports her year of birth as 1975. But in episode 4-2: "Charmed Again, Part Two," Paige spoke with the nun to whom she was given as an infant on August 2, 1977, and Paige is always described as having been "given up at birth" by Patty and Sam.

Plot hole: Paige realises at the end that time went on in her own dimension at the same time as it went on in the alternate reality, and Piper calmly comments "Oh there you are. We were wondering" or words to that effect. Paige had been gone over a day and Leo wouldn't have been able to sense her across dimensions. Weren't Phoebe or Piper the least bit worried about her?