CREATE TABLE table_23554 ("#" TEXT, "Original title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original airdate" TEXT, "Prod. code" TEXT, "Viewers" FLOAT)

When 1.17 is the production code how many air dates are there?
SELECT COUNT("Original airdate") FROM table_23554 WHERE "Prod. code" = '1.17'
SELECT COUNT("Original airdate") FROM "table_23554" WHERE "Prod. code" = '1.17'