A power outage at Seattle Grace traps George (T.R. Knight) in an elevator with a seriously wounded police officer (Daniel Bess), forcing him to perform emergency surgery. The outage also causes another patient to lose his "pain medication"--to be exact, his collection of video porn--forcing Cristina (Sandra Oh) to do some clever improvising. Elsewhere, after trying to convince a religious zealot to authorize surgery for his daughter, Meredith (Ellen Pompeo) has a showdown with Derek (Patrick Dempsey). And Meredith's delusional mother Ellis (Kate Burton) waxes nostalgic over her long-ago love affair--with Seattle Grace's chief surgeon Webber (James Pickens Jr.) ~ Hal Erickson, Rovi