These are immunotherapy drugs being studied in several tumor types. There are 2 approved drugs, nivolumab and pembrolizumab. They are approved for other tumor types including lung cancer and melanoma, but there are some data in bladder cancer as well. Certain patients will likely respond better than others, possibly based on the characteristics of their tumors (high expression of PD-1 will possibly respond better). The brand names of these drugs are Opdivo and Keytruda (again, not yet approved for bladder cancer). You can search these names and find more info. These drugs work by increasing your own immune system's ability to attack the cancer cells.
12/2015 - TURBT, non-invasive T1, mixed grade, 3 tumors
1/2016 - Begin BCG weekly for 6 weeks