CREATE TABLE table_73786 ("Series #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Viewers  ( in millions ) " TEXT)

What is the episode number of 'you gonna do that the rest of your life?
SELECT "Series #" FROM table_73786 WHERE "Title" = 'You Gonna Do That the Rest of Your Life?'
SELECT "Series #" FROM "table_73786" WHERE "Title" = 'You Gonna Do That the Rest of Your Life?'