Question: who wrote the episode "He Ain't Heavy"?
SQL: SELECT "Written by" FROM "1-27913766-1" WHERE "Title" = '"He Ain''t Heavy"';

Question: how many times was the episode "The Old Maid of Honor" originally aired?
SQL: SELECT COUNT("Original air date") FROM "1-27913766-1" WHERE "Title" = '"The Old Maid of Honor"';

Question: the episode "A Change in Heart/Pants" had a maximum of what number in the series?
SQL: SELECT MAX("Series #") FROM "1-27913766-1" WHERE "Title" = '"A Change in Heart/Pants"';