Amazon offers Murdoch Mysteries: Season 18 [Blu-ray] for (reg. $38.99) free shipping. 

Product Description:
Murdoch forfeits promotion to Inspector and continues doing what he does best—solving the intricate murders and complex crimes that plague Toronto. The station house welcomes the jovial and highly regarded Albert Choi (Paul Sun-Hyung) to the team in the all-new season of Murdoch Mysteries.​