Look out for each other
During the arraignment of a hostile murderer, the criminal grabbed a court officer's gun and shot Erin in the shoulder. While Erin was bleeding out, he negotiated with Danny Reagan that he would let her go if he received safe passage out of the country. When Danny lured him outside under the pretense of taking him to the airport, an old Reagan family secret helped Danny distract the murderer in time to shoot him and save his sister.
Nicky [at the table with the rest of the Reagans]: I am grateful to you, Uncle Danny, for saving my mom.