Elwy McMurran Yost, was a Canadian television host, best known for hosting CBC Television's weekday Passport to Adventure series from 1965 to 1967, TVOntario's weekday Magic Shadows, from 1974 until the mid-1980s, and Saturday Night at the Movies from 1974 to 1999.

TVO, formerly known as TVOntario, is a publicly funded English-language educational television network and media organization serving the Canadian province of Ontario. It operates flagship station CICA-DT in Toronto, which also relays programming across portions of Ontario through eight rebroadcast stations. All pay television providers throughout Ontario are required to carry TVO on their basic tier, and programming can be streamed for free online within Canada.