This episode highlights the sweet, often overbearing friendship between Will and Grace, as well as the eccentric dynamics of the core group when forced to keep secrets.
You can find more details or full scripts on fan sites like the Will & Grace Wiki or Durfee.net . "Will & Grace" Leo Unwrapped (TV Episode 2003) - IMDb [S5E20] Leo Unwrapped
Despite Will's best efforts to keep them apart, Grace accidentally bumps into Leo. Realizing Will has put so much effort into the surprise, she and Leo decide to pretend they haven't seen each other to keep Will's "surprise" intact. Realizing Will has put so much effort into
Leo arrives earlier than expected and immediately clashes with Will, who insists on keeping him "under house arrest" until the big reveal. Leo (Harry Connick Jr.)
Will (Eric McCormack) tries to surprise Grace (Debra Messing) for her birthday by flying her husband, Leo (Harry Connick Jr.), back from his Doctors Without Borders assignment in Africa.