I very much enjoy the development of other characters on the show. They show a lot of passion as well as compassion for their work.
The young boy with the most interesting of problems was handled very well. Grandpa was a little out there though and his appearance could have been eliminated. The relevation of him being bi-racial was not a big surprise in that she was reluctant to get the old records.
Christina was told by the other nurse: He will give up on you long before you give up on excuses. I can understand her caution as to having been with only one man, but it hasbeen two years since he died. They need to move that arc along.