An odd proposition for a TV crossover

[gnomi]

"Next on PBS: A joint project with USA Network. Over 4,000 people have mysteriously reappeared after being missing, some for more than 50 years. Join us as we move into the quarantined government building where they're staying. Follow them as they learn their way around the year 2004 and discover their new talents. All this week on...'The 4400 House!'"