bill portman was husband to the incredible mary portman. his first appearance is in season six of greys when he comes to the hospital with mary portman to have here colostomy/poop bag reversed, then she asks for a pizza and he goes to get one for her before she is npo for surgery. but as we know the tragic shooting happens, but mary happily lives and trys to help doctor bailey save charles percy but sadly at the end he does not live. then bill and her are united again and go travel the world together.
Then in season 7 bill and mary return to have marys colostomy bag reversed because she couldnt last time. mary goes in for surgery but due to a very rare complication mary cannot wake up and slips into a coma, then bill has to make an incredibly hard decision and takes mary of life support