TV picks: 'Life at Vet U,' 'Saturday Night Live,' 'Westworld' and more

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* LIFE AT VET U. 10 p.m.

Saturday, Animal Planet.

Fourth-year students at the University of Pennsylvania's veterinary medicine school are followed in a six-episode series in which the mostly four-legged patients are uniformly endearing .

* SATURDAY NIGHT LIVE.

11:29 p.m. Saturday, NBC10.

Actress Margot Robbie hosts Season 42 premiere. The Weeknd is musical guest.

* WESTWORLD. 9 p.m. Sunday, HBO.

Anthony Hopkins, Evan Rachel Wood, Thandie Newton, Ed Harris, and Jeffrey Wright star in a series inspired by the 1973 Michael Crichton film that raises questions about what makes us human while serving up provocative images of sex and violence.

* KEVIN HART PRESENTS: HART OF THE CITY. 11:30 p.m. Sunday, Comedy Central.

Philadelphia's Hart visits eight cities, including his hometown, in new series that spotlights rising young comedians. First stop: Atlanta.

* TIMELESS. 10 p.m. Monday, NBC10.

From Shawn Ryan (The Shield) and Eric Kripke (Supernatural) comes a new time-travel show, starring Abigail Spencer (Rectify) as a historian sent back into the past as part of a team trying to keep a criminal (Goran Visnjic, ER) from screwing up the present.

* NO TOMORROW. 9 p.m.

Tuesday, CW57.

Time travel's all very well, but what if the present is all we have? Tori Anderson plays a woman whose life is turned upside down by a man (Joshua Sasse, Galavant) who's convinced the end of the world is near.