CREATE TABLE table_24034 ("Ep." FLOAT, "Season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Prod. Code" TEXT)

When 5a06 is the production code what is the highest episode?
SELECT MAX("Ep.") FROM table_24034 WHERE "Prod. Code" = '5A06'
SELECT MAX("Ep.") FROM "table_24034" WHERE "Prod. Code" = '5A06'