Opera at Guild Hall The Met: Live in HD will return to Guild Hall on Saturday at noon with a simulcast of Francis Poulenc’s 1956 opera, “Dialogues des Carmélites.” Set between 1789 and 1794 in Paris and Compiègne, France, the opera was inspired by the true story of 16 Carmelite nuns and lay sisters who were guillotined as victims of the French Revolution’s anti-religious zeal.Yannick Nézet-Séguin conducts the John Dexter production, which features Isabel Leonard, a mezzo-soprano, as Blanche and Karita Mattila, a soprano, as the prioress. Tickets are $22, $20 for members, and $15 for students.For those wishing to delve deeper into Poulenc’s opera, Victoria Bond, a noted composer, conductor, and opera scholar, will give a pre-opera lecture at 11 a.m. Tickets are $30, free for Guild Hall’s opera donors.Comedy at Bay StreetBay Street Theater in Sag Harbor, in partnership with Joseph Vecsey (a comedian seen in Optimum’s “The Unmovers” and Netflix’s “Father of the Year”), will host a new All Star Standup Comedy show on Saturday at 8 p.m. The program will feature sets by Anthony DeVito (“The Late Show With Stephen Colbert” and Comedy Central), Kevin Farley (“Curb Your Enthusiasm,” “The Waterboy”), and Samantha Ruddy (also of Stephen Colbert’s show). Tickets are $30 in advance, $40 the day of the show.In Process @ WMCIn Process at the Watermill Center will provide an opportunity on Saturday between 2 and 4 p.m. for the public to see what the current resident artists are working on.Colectivo Zoologico, a group of multidisciplinary artists from France and Chile committed to contemporary theater, will stage its current work in progress, “Project Nora,” an adaptation of Ibsen’s “A Doll’s House.”During her residency, Eileen O’Kane Kornreich will construct photo collages of the Watermill Center’s trees and surrounding landscape and conduct research on the property’s history. Maya Watanabe, a Peruvian visual artist, and Agustina Munoz, an Argentinian who works in performance and film, will collaborate on “The last message was in the sky,” a vision of nature staged as a dramatic event.Laurie Lambrecht, a Bridgehampton native who works in photography and fiber, and Toni Ross, a sculptor and installation artist who lives in Wainscott, will collaborate and develop their respective practices while at the center.Free tours of the building, grounds, gardens, art collection, and study library will be offered between 1 and 2 p.m. Reservations, which are required for the tours and the public programs, can be made at watermillcenter.org.Two in Salon SeriesBrandon Ridenour, a trumpeter and composer, and Jeremy Jordan, a pianist, will give a Salon Series concert at the Parrish Art Museum in Water Mill Friday at 6 p.m. Mr. Ridenour, who won the 2014 Concert Artists Guild Victor Elmaleh Competition, is active as a soloist, chamber musician, and in the recording studio. His recent project “Come Together” features his arrangements of Beatles’ songs scored for a variety of instruments.Mr. Jordan has appeared as a soloist and chamber musician at venues throughout the United States and Europe, among them Carnegie Hall, Orchestra Hall in Chicago, the Concertgebouw in Amsterdam, and the Rudolfinum in Prague.A reception with the artists will follow the concert. Tickets are $25, $10 for members and students.Secret GardensThe Garden Conservancy has announced that two private gardens in East Hampton will be open for public viewing on Saturday from 10 a.m. to 4 p.m.The Biercuk and Lucky Garden at 18 Sayres Path in Wainscott is a four-season woodland garden with a high oak canopy. It includes rhododendrons, azaleas, kalmia, pieris, and smaller trees.Glade Garden at 44 Glade Road, which is tended by Abby Jane Brody, a former Star garden writer, boasts rare and unusual ornamental trees and shrubs and shade-loving perennials nestled in native woods and formed over 35 years. There will also be a plant sale at this garden.Admission to each is $10, with children under 12 admitted free.