Mr. & Mrs. Smith - watch online: streaming, buy or rent
Currently you are able to watch "Mr. & Mrs. Smith" streaming on Crave, Crave Starz, Starz Amazon Channel. It is also possible to buy "Mr. & Mrs. Smith" on Microsoft Store, Apple TV, Cineplex, Amazon Video as download or rent it on Apple TV, Microsoft Store, Amazon Video, Cineplex online.
You can also stream the title for free on Plex.