There was a program once, here in the UK which sent data via a flashing dot in the bottom of the screen. You attached a little photo-sensor on the bottom of the screen while the show was being broadcast (similar I guess to those casio watches). I'm not sure what the data rate was though, as I never made one of the gizmo's for decoding it. On a similar note, does anyone own one of those toys for the Captain Power TV series. Apparently it picked up the "interference" pattern on the bad guy's chest, and allowed you to shoot it. It also, if memory serves, picked up the enemy's laser, and would tell you if you had been shot. Anyone know of any other good interactive TV attempts? Grant. ---------- <classiccmp(a)u.washington.edu>