Colin Farrell and Ewan MacGregor turn in stellar performances as brothers in "Cassandra's Dream," a stark tragedy which demands that its protagonists choose between loyalty to family and the right thing to do; and because of their respective failings, they become enmeshed in a net from which there is no escape.
This film will not be everybody's cup of tea. It is clear that Woody Allen is not out to please the average movie-goer (nor should he necessarily); throughout the film he alludes to Greek tragedy. By beginning slowly--perhaps a bit too slowly--and then tightening the screws of the plot, Allen takes his characters to the critical moment where they have a choice; then, after a final twist as they pass the point-of-no-return, he begins to loosen his grip on the plot as the action unwinds to its logical conclusion.
Allen alludes specifically Aeschylus' "Oresteia"--the tragedy of murder within the family; blood-begetting-blood; and its resultant guilt and madness. The very title, "Cassandra's Dream," alludes to Aeschylus' drama; for in a trance, Cassandra--with the gift of prophecy that no one believes--foretells the murders that are about to take place within the house. In a similar manner, Allen's opening and closing camera shots that focus on the boat named "Cassandra's Dream," both foreshadow and look back on murder for which the viewer, like the Greek chorus, is unprepared.
This is not Allen's only subtle use of irony in the context of tragedy: In mid-film, when the aspiring actress, who is in love with one of the brothers, meets a serious theatre director, who confides that Euripides' "Medea" is his favorite tragedy, she betrays her lack of theatrical gravitas by replying that yes, Clytemnestra is her favorite character. Since Clytemnestra is not in "Medea" but in the "Oresteia," Allen indicates that she will likely not get the part and the break which she so desperately craves.
"Cassandra's Dream" is a difficult film to watch, but then so is Aeschylus' "Oresteia," the only difference being that the latter, set in ancient Argos, offers the theatre-goer the distance of some two-and-a-half millennia, while the former, set in modern-day London, is too close for comfort.