Starring: Patricia Arquette, Sofia Vassilieva, Miguel Sandoval, Maria Lark
Pain Killer - S6-E3
Continuity mistake: When Allison is in the shower, she has total use of her right arm, hand, wrist and fingers, where in all scenes before and after she holds her right hand and fingers close to her chest and doesn't move her fingers and hand freely.
Allison Dubois: I just had a weird dream.
Joe Dubois: Of course you did. It's a day ending in "Y."
Trivia: In "Four dreams" the alternative Allison who doesn't have children looks at some kids in a restaurant and gets a dreamy look on her face. The mother of the children she is admiring addresses her daughter as "Sofia". The "real" Allison's daughter Ariel is played by actress Sofia Vassilieva.