Don asks Charlie to help him during a home invasion case. Charlie's results confirm the area that the suspects would hit next. While checking out the property after a gun battle with the four suspects, a fifth man comes out and stabs Don, puncturing Don's left lung and nicking Don's pulmonary artery. After Don is out of surgery, he goes into cardiac arrest and flatlines. The doctors are able to revive him. Don finally wakes up to Alan by his bedside. Later, his team comes for a visit. He tells them that he is allowed to return to desk duty initially and then full duty about a week later.
