For my non-tweeting friends:
This pic was posted by luvit808 Instagram. Apparently this little boy’s name is Xander and he’s not an actor but was a real patient fighting cancer. Since this was filmed he has had a relapse. It was already my second favorite scene of the episode. How can you not love McG going to visit a sick child and helping his dad be a BAMF researcher??!!
Gives this entire scene a new spin. ❤