Colonel Mustard in the Conservatory with the Wrench - S10.E13

Michael likes Ellen, a classmate, but she likes Johnny.Jill buys a wedding gown. Gary is arrested for breaking into Jill's apartment, but Jill tells the police to let him go because Gary just can't accept their breakup. Mac finds the forger, but she's comatose and dying in the hospital. Gary, the MacKenzies and Williams wonder why Jill had gotten barbiturates, and remember that Val hadn't had her prescription filled. Pat says if a barbiturate is mixed with alcohol, it will knock someone out. Mack and Gary go to see David Lamb, who admits to them that all he remembers is going to Jill's room, and then waking up the next day.