When Danny finds the SG on Omen's underwear and prints them onto paper they appear correctly to the viewers, therefore Danny would be seeing them backwards if he could see them through the paper at all.
Hawkes says: Nine suicide girls, all wearing stilettos. However, in the promotional image he shows Danny and Lindsay, Amina Suicide (credited as Amina Munster) is wearing heavy sneakers, in the same colour as the other girls' shoes.
When the Suicide Girls are interrogated by Danny in the beginning, he finds a pick that appears to be intact and clean. He sprays the reagent on it, and in the close shot it suddenly has red spots, then in a remote shot it has the tell-tale pink hue to it. When the pick is later on scrutinized in the laboratory, its tip appears to be thoroughly soaked in blood, and as if a piece was missing.
Omen submit a regular video of her, full clothed, speaking to the camera, in order to become a "Suicide Girl". In real life, in 2005-2006, to become a "Suicide Girl" model, a woman must submit a photo session of herself meeting the criteria of the "Suicide Girls" website (erotic photography).
Mac asks the priest about Chopper's confession, and the priest tells him. This wouldn't actually happen, seeing as even after death, a priest is not allowed to reveal a confession. But the priest would disclosure a conversation that could take place before the confession, as if Chopper was looking for advice.
At the beginning of the episode, when Lindsay takes pictures of the scene, it is clearly noticeable that Anna Belknap is pregnant even though her character is not. It is also visible at the end of the episode when Lindsay tells Danny that it is her turn to talk to Mrs. Sanders and in several other scenes during the episode.