Merlin’s adventures continue next Saturday with the fifth episode of 13, His Father’s Son.

For the first time since his coronation, Arthur finds out what it’s really like to be King. Arthur faces his first true test as King when he incurs the wrath of the formidable Queen Annis. With the lives of thousands hanging in the balance, Arthur must find the strength to be his own man and become the leader Camelot so desperately needs.

Trailer: