This episode is a 2 hour special.
The funeral service book says 1966-2015 which means Derek was either 48 or 49 at the time of his death.
Also aired as a two-part episode, titled She's Leaving Home Part One and She's Leaving Home Part 2.
First appearance of Aniela Gumbs playing Zola. She goes on to play her the rest of the series.
She's Leaving Home is a song by The Beatles.