[s2e4] Deny, Deny, Deny -

: Meredith's mother, Ellis, who is suffering from Alzheimer's, is admitted to the hospital and causes chaos among the staff. She mistakes George for her ex-husband, Thatcher, leading to a difficult shift for him.

: Addison Shepherd delays her departure from Seattle to assist with a complicated surgery on a cystic fibrosis patient. This leaves Derek in a state of limbo regarding his divorce and his relationship with Meredith. [S2E4] Deny, Deny, Deny

: Following her emergency surgery for an ectopic pregnancy, Cristina is a difficult and restless patient. Her mother’s overbearing presence only worsens her mood, culminating in her famous emotional collapse where she screams, "Somebody sedate me!". : Meredith's mother, Ellis, who is suffering from

: While avoiding her own recovery, Cristina identifies a patient, Kalpana Vera, who is faking symptoms. It is eventually discovered that Kalpana has Munchausen syndrome and has been inducing her own illness with unlisted medications. This leaves Derek in a state of limbo