The Hard Choice on 'Mercy' (VIDEO)

On the medical drama 'Mercy' (Wed., 8PM ET on NBC), a mother faces a difficult decision. Her daughter Shannon was nearly killed in an accident caused by her stepdaughter, Robin. Now only the mother can save her stepdaughter's life. But does she even want to?

Watch the video after the jump.On the medical drama 'Mercy' (Wed., 8PM ET on NBC), a mother faces a difficult decision. Her daughter Shannon was nearly killed in an accident caused by her stepdaughter, Robin. Now only the mother can save her stepdaughter's life. But does she even want to?

Mike Callahan (Diego Klattenhoff) tells the mom that she can give her stepdaughter a potentially lifesaving transplant. The question is this: can she overcome her anger and make the right choice?