Television
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    TV CRITIC’s CORNER

    ‘Boston EMS’ is on the job

    A scene from ABC’s “Boston EMS”
    Lorenzo Bevilaqua/abc
    A scene from ABC’s “Boston EMS”

    Boston EMS 10 p.m., ABC

    If a nice relaxing Saturday night at home sounds like the exact opposite of what you’re after, tonight begins another white-knuckled season of ABC’s no-frills docu-series on the heroes of Boston Emergency Services, who would probably love a relaxing Saturday night at home. This episode, a stabbing in the park and a potential jumper on the brink.

    Killer Coach 8 p.m. Lifetime

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    This Lifetime movie starring Keesha Sharp, Javicia Leslie, and Tom Maden might be about a swim coach whose insecurity and anger make him a threat to his star athlete. It could also be about a really tricked-out train car. Or a murderous handbag. There’s really only one way to find out.

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    Saturday Night Live 11:30 p.m., NBC

    Amy Schumer slays the crowd!

    Austin City Limits 11 p.m. PBS

    Cassandra Wilson burns the house down!

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    Sharknado 4: The 4th Awakens Sunday 8 p.m., Syfy

    Ian Ziering chainsaws sharks.

    Michael Andor Brodeur can be reached at mbrodeur@globe.com. Follow him on Twitter @MBrodeur.