Which late-night program premiered in 2014 with John Oliver as its host?

Last Week Tonight premiered in 2014 with John Oliver as its host.

The HBO program debuted on April 27, 2014. John Oliver had previously worked as a correspondent and guest host on The Daily Show, and his new series combined a weekly monologue with longer investigative pieces about politics, law, economics, and international affairs.

Unlike a nightly desk show, Last Week Tonight is broadcast weekly. Its main segments often examine one subject in substantial detail, using research, interviews, visual comedy, and documentary-style reporting. The format helped distinguish it from conventional daily late-night programs.

Oliver's role is both host and executive producer. The show has addressed topics ranging from infrastructure and voting rights to consumer contracts and public health. Its weekly schedule and issue-focused structure are common sources of confusion when it is grouped broadly with nightly talk shows.