At 2:20 in the episode, young Harry Bosch knocks on his birth father, J. Michael Haller's, door. Haller's young son, answers the door, when the elder Haller's comes to the door, he tells his son to go finish his lunch. Young Haller replies, "Alright, alright, alright". Young Haller grows up to be Mick Haller, "The Lincoln Lawyer", played in the movie version by Matthew McConaughey, based on the novel by Michael Connelly.
Though not identified in the moment, the young boy is Mickey Haller who is Harry's half brother. The boy says "alright, alright, alright", which is the catchphrase of Matthew McConaughey; Matthew McConaughey played Mickey Haller in 2011 film adaptation of The Lincoln Lawyer.
Eamonn Welliver, the young actor that plays Harry when he was first starting out as a policeman is actually Titus Welliver's oldest son (born May 20, 1999.)
The actor portraying young Bosch, with similarly piercing blue eyes, bears a striking resemblance to Titus Welliver in this episode. Interestingly enough, the young actor's name is Eammonn Welliver, and he is Titus Welliver's son.