At the end of this episode, the ultrasound shows that Caroline is indeed carrying Alaric and Jo's twins. However, the ultrasound shows the twins sharing the same amniotic sac, suggesting they are identical twins, when in fact all flash forward scenes and later episodes as well as the later formed series 'Legacies' (a spin off from this series and The Originals) shows the twins to be fraternal and therefore they would have been in separate amniotic sacs.