Title: List of Dragon Ball Z episodes
Content:  Dragon Ball Z (ドラゴンボールゼット) is the long-running anime sequel to the Dragon Ball TV series, adapted from the final twenty-six volumes of the Dragon Ball manga written by Akira Toriyama. The manga portion of the series debuted in Weekly Shōnen Jump in October 4, 1988 and lasted until 1995; the anime adaptation premiered in Japan on Fuji Television on April 26, 1989, taking over its predecessor's time slot, and ran until its end on January 31, 1996, lasting 291 episodes in Japan, and 276 episodes in the United States originally, although all 291 episodes were later broadcast when content from the first 67 episodes was restored. Dragon Ball Z uses four pieces of theme music in the Japanese version. From episodes 1–199, the opening theme is "Cha-La Head-Cha-La" by Hironobu Kageyama, and the closing theme is "Detekoi Tobikiri Zenkai Pawā!" by MANNA. From episodes 200-291, the opening and closing themes are "We Gotta Power" and "Boku-Tachi wa Tenshi Datta," both by Hironobu Kageyama.
Title: List of Dragon Ball Z episodes
Content:  The "seasons" that comprise the following list correspond to the remastered box sets released by Funimation from 2007 to 2009; these correspond to story arcs (which are themselves split at debatable points), and not to the pattern in which the series actually aired in either Japan or the United States. In Japan, Dragon Ball Z was aired year-round continuously, with regular off-days for sporting events and television specials taking place about once every six weeks on average. The English broadcast was divided into eight separate near-continuous blocks with breaks varying between four months to over a year between each block. Only in one instance, between episodes 194 and 195, was there actually parity between the DVD release and the actual broadcast sequence in terms of the end of one "season" and the beginning of the next.
Title: Dragon Ball Z (season 6)
Content:  The sixth season of Dragon Ball Z anime series contains the Cell Games arc, which comprises Part 3 of the Android Saga. The episodes are produced by Toei Animation, and are based on the final 26 volumes of the Dragon Ball manga series by Akira Toriyama. The 29-episode season originally ran from November 1992 to July 1993 in Japan on Fuji Television. The first English airing of the series was on Cartoon Network where Funimation Entertainment dub of the series ran from November 2000 to February 2001. The episodes also aired in Australia and New Zealand. The Netherlands, the United Kingdom, the Republic of Ireland, and Canada, all received a different English dub: one made in Canada. Funimation released the season in a box set on September 16, 2008 and in June 2009, announced that they would be re-releasing Dragon Ball Z in a new seven volume set called the "Dragon Boxes". Based on the original series masters with frame-by-frame restoration, the first set was released November 10, 2009.
Title: Dragon Ball Z
Content:  Dragon Ball Z (ドラゴンボールZ) is a Japanese anime television series produced by Toei Animation. Part of the Dragon Ball media franchise, it is the sequel to the 1986 Dragon Ball anime series and adapts the latter 325 chapters of the original Dragon Ball manga series created by Akira Toriyama, which ran in Weekly Shōnen Jump from 1988 to 1995. The series aired in Japan on Fuji TV from April 1989 to January 1996 and was later dubbed for broadcast in at least 81countries worldwide. Dragon Ball Z continues the adventures of Son Goku in his adult life as he and his companions defend the Earth against villains including aliens (Vegeta, Frieza), androids (Cell), and magical creatures (Majin Buu). 
Title: Dragon Ball
Content:  In February 2009, Dragon Ball Z celebrated its 20th anniversary, with Toei Animation announcing that it would broadcast a re-edited and remastered version of the Dragon Ball Z anime under the name Dragon Ball Kai (ドラゴンボール改). The footage would be re-edited to follow the manga more closely, eliminating scenes and episodes which were not featured in the original manga, resulting in a more faithful adaptation, as well as in a faster-moving, and more focused story. The episodes were remastered for HDTV, with rerecording of the vocal tracks by most of the original cast, and featuring updated opening and ending sequences. On April 5, 2009, the series premiered in Japan airing in Fuji TV. Dragon Ball Z Kai reduced the episode count to 159 episodes (167 episodes internationally), from the original footage of 291 episodes. Damaged frames were removed, resulting in some minor shots being remade from scratch in order to fix cropping, and others to address continuity issues. The majority of the international versions, including Funimation Entertainment's English dub, are titled Dragon Ball Z Kai.
Title: Dragon Ball Z (season 8)
Content:  The eighth season of the Dragon Ball Z anime series contains the Babidi and Majin Buu arcs, which comprises Part 2 of the Buu Saga. The episodes are produced by Toei Animation, and are based on the final 26 volumes of the Dragon Ball manga series by Akira Toriyama. The 34-episode season originally ran from March 1994 to January 1995 in Japan on Fuji Television. The first English airing of the series was on Cartoon Network where Funimation Entertainment dub of the series ran from October 2001 to October 2002. The episodes also aired in Canada, the United Kingdom, the Netherlands, Australia, and the Republic of Ireland. Funimation released the season in a box set on February 10, 2009, and in June 2009, announced that they would be re-releasing Dragon Ball Z in a new seven volume set called the "Dragon Boxes". Based on the original series masters with frame-by-frame restoration, the first set was released November 10, 2009.
Title: Dragon Ball Z
Content:  The Dragon Ball Z films comprise a total of 15 entries as of 2015. The first 13 films were typically released every March and July during the series' original run by the spring and summer vacations of Japanese schools. They were typically double features paired up with other anime films, and were thus, usually an hour or less in length. These films themselves offer contradictions in both chronology and design that make them incompatible with a single continuity. All 15 films were licensed in North America by Funimation, and all have received in-house dubs by the company. Before Funimation, the third film was a part of the short-lived Saban syndication, being split into three episodes, and the first three films received uncut English dubs in 1998 produced by Funimation with Ocean Studios and released by Pioneer. Several of the films have been broadcast on Cartoon Network and Nicktoons in the United States, Toonami UK in the United Kingdom (these featured an alternate English dub produced by an unknown cast by AB Groupe), and Cartoon Network in Australia.
Title: Dragon Ball Z (season 1)
Content:  September 1997, primarily on FOX, UPN and WB affiliate stations in the United States and Canada. The 39 episodes were cut down to a mere 28. Their edited adaptation was syndicated to television by Saban Entertainment, and was released by Geneon Entertainment (then known as Pioneer) on VHS and DVD between 1997 and 1999. Eventually, Geneon Entertainment lost the distribution license to the first 67 episodes and Funimation began redubbing the series for an uncut broadcast. The unedited version was released on DVD in 2005, but later cancelled and Funimation eventually began releasing season box sets of Dragon Ball Z and they re-released their first season on February 6, 2007. In late 2013, the company 
Title: Dragon Ball Z (season 5)
Content:  The fifth season of the Dragon Ball Z anime series contains the Imperfect Cell and Perfect Cell arcs, which comprises Part 2 of the Android Saga. The episodes are produced by Toei Animation, and are based on the final 26 volumes of the Dragon Ball manga series by Akira Toriyama. The 26-episode season originally ran from May to November 1992 in Japan on Fuji Television. The first English airing of the series was on Cartoon Network where Funimation Entertainment dub of the series ran from October to November 2000. The episodes also aired in Canada, the United Kingdom, the Netherlands, Australia, and the Republic of Ireland. Funimation released the season in a box set on May 27, 2008 and in June 2009, announced that they would be re-releasing Dragon Ball Z in a new seven volume set called the "Dragon Boxes". Based on the original series masters with frame-by-frame restoration, the first set was released November 10, 2009.
Title: Dragon Ball Z
Content:  and creating a new one would result in more promotional money, and the result was the start of Dragon Ball Z. The title was suggested by Toriyama because Z is the last letter of the alphabet and he wanted to finish the series because he was running out of ideas for it. Ironically enough, the sequel series would end up producing more episodes than its predecessor. Dragon Ball Z is adapted from the final 324 chapters of the manga series which were published in Weekly Shōnen Jump from 1988 to 1995. It premiered in Japan on Fuji Television on April 26, 1989, taking over its predecessor's 

Question: how many episodes are there in dragon ball z?
Answer: 291 episodes.
291.