Is there a better music in the world for the three hours before 5:00 a.m. than dub reggae? No party-rocking needed at that hour--not on a weekday, anyway--and no wake-up jams required. At 2:00 a.m. on a Wednesday morning, you're either home from a second-shift job, well into a third shift, leaving the bar, or unable to sleep. In any of these cases, the most mysterious music ever created suits the moment just fine. The atmospheric, bass-dominated echo-rock of classic '70s Jamaican studio scientists sounds a lot like the upside-down version of surf or psychedelia conjured by the deep-sleep subconscious. This is the whale call of groove music, and it talks to you in strange ways at this hour, especially with host Dr. StrangeDub doing the time warp again. He's there each week, dipping back into rock-steady or pushing forward into every variety of newer music influenced by dub's pioneers, from Bill Laswell to Mad Professor. The last half-hour is usually given over to a prerecorded mix by StrangeDub's partner DJ Baby Swiss, which swings you into jump-up or ragga--your REM soundtrack before wakey-time. The whole show feels like a journey, in other words: a long trip between the only restaurants still open, where even the fry cooks are dreaming.