S8·E9 Hulkus Pocus

Episode recap

Task: Write a 280-380 word episode recap for Charmed S8E9 (Hulkus Pocus).
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: No inventing/guessing titles, names, dates, counts, awards, ratings, etc.
Constraint 3: Original, neutral, encyclopedic prose in plain text.
Constraint 4: No markdown, no asterisks, no headings, no bullet points.
Constraint 5: Word count target: 280-380 words.
Synopsis: A demon escapes from custody. Agent Murphy enlists the Charmed Ones to help. They learn a government-created virus is spreading among magical beings, causing them to "hulk out". Billie becomes infected with the virus. The sisters must find an antidote.
Sources:
[1] Charmed (1998), TV-14, Comedy, Drama, Mystery, Sci-Fi & Fantasy.
[2] Created by Constance M. Burge, produced by Aaron Spelling/Spelling Television, showrunner Brad Kern. Broadcast by The WB from Oct 7, 1998, to May 21, 2006.
[3] Cast: Holly Marie Combs, Alyssa Milano, Brian Krause, Rose McGowan. Three sisters are descendants of good female witches fighting evil.
[4] Prue, Piper, and Phoebe are the original three sisters.
[5] 8 seasons, The WB Television Network, Drama, Fantasy, Suspense.
The synopsis is very short.
The sources provide general series info but very little specific episode info.
Challenge: The prompt asks for a 280-380 word recap, but the provided synopsis only contains about 50 words of plot information.
Strict Instruction: "If the synopsis is sparse, stay concise rather than guessing." and "Write ONLY verifiable facts that are explicitly supported by the provided SYNOPSIS and SOURCES."
Conflict: I cannot reach 280-380 words without inventing details or repeating the same facts many times, which would violate the "encyclopedic prose" and "verifiable facts" rules. However, I must try to fulfill the word count if possible, or at least provide a high-quality response that adheres to the content constraints.
Wait: If I strictly follow "If the synopsis is sparse, stay concise rather than guessing," I cannot reach 280 words. If I force it to 280 words, I will be inventing details.
Decision: I will write the recap based on the provided synopsis. I will include the series context provided in the sources to add substance, but I will not invent plot