What is the total number of episodes where alexa wyatt is the writer?
CREATE TABLE table_20590 (
    "Season #" real,
    "Series #" real,
    "Title" text,
    "Director(s)" text,
    "Writer(s)" text,
    "Original airdate" text
)
SELECT COUNT("Series #") FROM table_20590 WHERE "Writer(s)" = 'Alexa Wyatt'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the total number of episodes where alexa wyatt is the writer? ### Input: CREATE TABLE table_20590 (
    "Season #" real,
    "Series #" real,
    "Title" text,
    "Director(s)" text,
    "Writer(s)" text,
    "Original airdate" text
) ### Response: SELECT COUNT("Series #") FROM table_20590 WHERE "Writer(s)" = 'Alexa Wyatt'