* 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.
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.