S7·E3 Superfreak

Episode recap

Task: Write a 280-380 word episode recap for Grey's Anatomy S7E3 (Superfreak).
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: Do not invent/guess titles, names, dates, episode counts, awards, ratings, box-office, viewership, or plot points.
Constraint 3: If a detail is not in the material, omit it.
Constraint 4: Write original, neutral, encyclopedic prose in plain text.
Constraint 5: No markdown, no asterisks, no headings, no bullet points.
Constraint 6: Word count target: 280-380 words.
SYNOPSIS: "Issues surface when Derek's estranged sister, Amelia, visits unexpectedly; Meredith and Derek continue to try to ease Cristina back into surgery."
SOURCES:
[1] Grey's Anatomy (2005) TV-14 Drama.
[2] American television medical drama, debuted on ABC as mid-season replacement for Boston Legal on March 27, 2005.
[3] Created by Shonda Rhimes. Cast includes Ellen Pompeo, Chandra Wilson, James Pickens Jr., Kevin McKidd.
[4] Follows personal/professional lives of doctors at Seattle's Grey Sloan Memorial Hospital.
[5] Aired for twenty-two seasons.
Episode Title: Superfreak (from prompt).
Episode: Season 7, Episode 3.
Plot Point 1: Amelia, Derek's estranged sister, visits unexpectedly, causing issues.
Plot Point 2: Meredith and Derek attempt to ease Cristina back into surgery.
Setting: Seattle's Grey Sloan Memorial Hospital.
Series Context: Medical drama created by Shonda Rhimes.
The synopsis is extremely brief: "Issues surface when Derek's estranged sister, Amelia, visits unexpectedly; Meredith and Derek continue to try to ease Cristina back into surgery."
The word count requirement is 280-380 words.
Problem: The provided text contains almost no information to reach 280 words without violating the "never invent or guess" rule.
If I write only what is in the synopsis, I will have about 30 words.
If I expand using the sources, I can mention the show's creator, the hospital setting, and the general premise, but I cannot invent plot details.
Drafting attempt 1 (Mental):
The Grey's Anatomy episode titled Superfreak is the third episode of the seventh season. In this episode, issues surface when Amelia, who is the estranged sister of Derek,