THIS WEEK ON "NY MED," ER STAFF FACE WHAT WILL BECOME A MEDICAL MYSTERY WHEN A POPULAR NURSE, DIANA COSTINE, INEXPLICABLY BEGINS LOSING CONSCIOUSNESS AND FOR THE FIRST TIME FINDS HERSELF AT THE CENTER OF THE STORY

Plus: When a Bad Relationship Comes Unglued in Newark, it Leads to the Trauma Ward and a Scorned Lover Vows Revenge

And: An Uninsured Homeless Man Becomes the Unlikely Darling of the Surgical Floor and Undergoes an Expensive Lifesaving Surgical Fix from Top Specialists without Spending a Dollar

After nearly two years of production, "NY MED" is back. This fast-paced, eight-part series mostly toggles between the orderly operating rooms of Manhattan's New York-Presbyterian Hospital -- the primary venue for the series -- where renowned surgeons perform feats of medical brilliance and the sometimes hectic trauma wards of Newark's University Hospital where skilled doctors gallantly struggle to treat a flood of gunshot, stabbing and life-threatening trauma cases. The surgeons of NY MED never forget that there are limits to what medical science can do and that sometimes their best efforts come up short. In "Episode 204," which airs THURSDAY, JULY 17 (10:00-11:00 p.m., ET), viewers will encounter the following patients, doctors and nurses:

Popular New York Presbyterian nurse Diana Costine can win over even the most difficult patients with her upbeat attitude and infectious smile. Lately, however, the redhead from Milton, Massachusetts has been inexplicably losing consciousness and for the first time, finds herself at the center of the story as a patient. Can the doctors of New York Presbyterian solve this true medical mystery?

A young couple, in love since the day they met, has big wedding plans. But their future together is thrown into doubt when cardiac surgeon Len Girardi delivers the news that the groom could drop dead at any time if he doesn't have a complex but potentially life-saving operation. Their choice and their journey will terrify and amaze you.

Trauma surgeon Ziad Sifri thought he had seen it all growing up in war-torn Beirut. But at Newark's University Hospital where he works, patients arrive injured by hammers, box cutters and other household tools showing how personal things can get when family or romantic relationships fall apart.

At first glance he looks like a surf bum with his long blonde hair and slightly goofy grin. And this Long Island native is no stranger to the waves. But at New York Presbyterian's Columbia campus, Brad Zacharia is an elite neurosurgeon finishing a decade of residency in one of the most demanding fields in medicine. Enter Alexander Harrington, a homeless man who spends most nights on the streets in midtown Manhattan. He could end up completely paralyzed if some damaged vertebrae in his neck aren't repaired. It's not a problem that Alexander doesn't have a dime to pay for an expensive surgery costing tens of thousands of dollars. The problem is that he keeps figuring out ways to delay the operation and extend his stay at a hospital he regards as a fine hotel.

Don't miss "NY MED" on THURSDAY, JULY 17 (10:00-11:00 p.m., ET), on the ABC Television Network.

Terence Wrong is the executive producer of "NY MED." Erica Baumgart is the supervising producer and Monica DelaRosa is the senior series producer. Andy Genovese and Aysu Grodowski are series producers.