Complex sentence: The Comic Relief special in 2001 was set after Victor's death though starring Richard Wilson, Margaret did not interact with Victor's ghost, unaware of his presence, although she briefly complains about "cold air" beside her.
Split into simpler sentences: The Comic Relief special in 2001 was set after Victor's death. Though starring Richard Wilson, Margaret did not interact with Victor's ghost, being unaware of his presence, although she briefly complains about "cold air" beside her.