CREATE TABLE table_29261 ("No. in series" TEXT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

What is the name of episode # 10a?
SELECT "Title" FROM table_29261 WHERE "No. in series" = '10a'
SELECT "Title" FROM "table_29261" WHERE "No. in series" = '10a'