David Dinkins Makes Special Guest Appearance on 'Blue Bloods'

Dinkins poses with the cast of "Blue Bloods", which stars Tom Selleck. 

The former New York City mayor will appear on the hit CBS show on April 13 at 10 p.m. 

Episode Summary: Danny and Baez race to find a missing girl who will die without her heart medication; Jamie and Eddie are on the wrong side of an investigation after engaging in a car chase; and when Sean wins an essay contest, guess who presents him with the 'Mayor's Medal.' 

Source: Lynda Hamilton