I seriously doubt that there is a better film on this theme than Andrzej Wajda's "Kanal." On a very different scale, the storm drains of Los Angeles have been used to greater or lesser effect in quite a few movies, "Them," with the giant ants, probably best known. There's a brief reference to these tunnels towards the end of "Volcano," this years first entry in the summer stupidity sweepstakes. Stephen Brophy Cambridge, Mass. ---- To sign off SCREEN-L, e-mail [log in to unmask] and put SIGNOFF SCREEN-L in the message. Problems? Contact [log in to unmask]