movie-within-a-movie. Part David Lynch, part Pirandello, it throws viewers into the deep end of this "looking glass world" and "mad hatter's tea party." This much we know: Hopkins (who wrote, directed, and even composed the musical score) stars as a screenwriter, Felix Bonhoeffer. Most everything else is up for grabs. Slipstream unfolds in fractured fits and starts. Christian Slater and Jeffrey Tambor portray two actors in a wildly troubled movie ("the whole thing is going to hell in a hand basket" someone proclaims). John Turturro appears as a manic producer in a performance that makes his turn in Transformers look like a model of understatement. There is a Dolly Parton look-alike who introduces herself as "Doll...  (less)