Atari 400 in Magnum, P.I. - Season 4, Episode 3, "Smaller Than Life" (1983)
A child in the hospital ward next to Magnum has an Atari 400 (with an aftermarket keyboard) on which he plays games. He later helps Magnum confirm Waldo's identity using the 400 and a modem.
The game-playing is pretty accurate but the rest certainly is not.
mr_a500
Notice how when Magnum's typing on the computer, it's not even plugged in. (...or connected to the TV...or the phone) Close-ups of the keyboard appear to be of an Atari 800, not that weird Atari 400 add-on keyboard seen in other shots.
2010-01-14 18:01