A urine sample? You just want to protect Max Evans from whatever it is you're protecting him from. Maria, Liz, and Alex used to be inseparable. About replacing Max's blood at the hospital, discovering Topolsky was FBI, everything.
Plan: A: Max; Q: Who is injured in a car accident? A: a car accident; Q: What accident did Max get into? A: Liz pressures Alex; Q: Who wants to protect Max from medical procedures that could expose his identity? A: Alex; Q: Who does Liz pressure to help protect Max? A: blood samples; Q: What does Liz want Alex to provide to replace Max's? Summary: Max is injured in a car accident and Liz pressures Alex to help protect him from medical procedures that could expose his identity by providing blood samples to replace Max's.