My wife is a fan of NCIS and I just watched an episode of the Los Angeles version with her. In it, the bad guys take over a nuclear launch control center. They try to re-target the missiles. They appear to be using Commodore 64s but we don't get a close-up.
It's actually NCIS LA, Season 9, Episode 7. And I'm pretty sure it actually is a C64
This question on Movies&TV has some footage from the series and the computer definitely looks like a C64.