Gray Matters was only directed by Ron Howard.
The Messerschmitt Me 263 Scholle -LRB- plaice -RRB- was a rocket-powered fighter aircraft developed from the Me 163 Komet towards the end of World War II .. plaice. plaice. rocket. rocket. fighter aircraft. fighter aircraft. World War II. World War II. Three prototypes were built but never flown under their own power as the rapidly deteriorating military situation in Germany prevented the completion of the test program .