Question: What was the original air date of this episode that was written by Debbie Sarjeant?
SQL: SELECT "Original air date" FROM "1-17623902-1" WHERE "Written by" = 'Debbie Sarjeant';

Question: How many episodes did Julie Martin wrote for the show If every episode has its own production code?
SQL: SELECT COUNT("Production code") FROM "1-17623902-1" WHERE "Written by" = 'Julie Martin';