The backstory that 9-1-1 gave to Evan "Buck" Buckley is honestly so disappointing to me...
Like before we met Maddie, Buck was such a mystery... we knew nothing about him. So, the writers could've done something sooooo wild like made him some sort of 007. Instead they gave us Daniel and turned him into a donor baby?! They should've 100% done something with the Navy SEAL subplot.
Given the rescues they do, it would've fit into the universe. Explained how he travelled across the US without any problems?!