Here's an interesting read, this guy nailed it in interperting the dream sequence.
Episode 50- "Calling All Cars"- Aired 11/23/02
The Sopranos writers have always used dream sequences in a unique and brilliant way. This episode was not different. The show opens with Tony in the back seat of an old car, Carm is driving, Ralph (without his hair) is sitting in the front passenger seat and Gloria is sitting in back with Tony. Carm gives quick glances back at Tony while a large green caterpillar crawls on Ralphs head and evolves into a butterfly. Tony eventually wakes up in his own bed. What does this all mean? Tony asks Dr. Melfi to analyze the dream, but isnt' willing to get into the "drill". He doesn't get anywhere in the session and writes it off as a dream, but is obviously disturbed by it.
Looking at the potentially implied meanings:
The caterpillar is a symbol of change and the evolution into the butterfly implies that the change has already happened. Has something changed? Yes, many things have changed recently, but there may be more to be uncovered.
Carm is driving and Tony is in the back seat. Is tony afraid that Carm is taking control? He knows she found that money in the duck feed and he could easily assume it was invested her way.
Gloria is in the car and so is Ralph. Can there be some inference that everyone around his is dead, meaning that Carm is next (again referring to the meaning of the caterpillar)? Could it mean he is afraid he might die leaving Carm in charge? Reflecting on the Carm/Furio situation leaves this as a possibility. Tony's dreams always reflect thoughts that have not surfaced in the show dialogue
btw..Stuff like this for every episode at mobstory.com/episodes