Looks like überproducer John Wells has cooked up one of those "crossover events" for his NBC dramas ER and Third Watch. On ER's April 25 episode, a family emergency will summon Dr. Lewis (Sherry Stringfield) to New York, where she works with Third Watch paramedics Molly Price, Jason Wiles, Kim Raver and Amy Carlson. Lewis's storyline concludes on Watch's April 29 episode.