Upon TMNT's first arrival in the United Kingdom, Ireland, Sweden, Norway, Finland, Poland, Austria, Germany and some other countries in Europe, the name was changed to "Teenage Mutant Hero Turtles" (or TMHT, for short), since local censorship policies deemed the word ninja to have excessively violent connotations for a children's program. (In Ireland, however, the first season aired as "Teenage Mutant Ninja Turtles" before changing to "Teenage Mutant Hero Turtles").[15] Consequently, everything related to the Turtles had to be renamed before being released in these nations (comic books, video games, toys, etc.) The lyrics were also changed, such as changing "Splinter taught them to be ninja teens" to the "Splinter taught them to be fighting teens."
The policies also had other effects, such as removing use of Michelangelo's nunchaku (which were at the time banned from appearing in 18-rated movies) and generally toning down the usage of all the turtles' weapons. After many seasons of never using his nunchaku, they eventually disappeared entirely, replaced by a turtle shell shaped grappling hook called the "Turtle Line".[16]
However, when the live-action movie came out in 1990, the "Ninja" of the title was kept even in the UK. In time, nunchaku scenes were retained in previously-censored movies such as those of Bruce Lee. The same went for the PAL releases of the early video games, which had Michelangelo's weapon of choice fully visible and usable.
By the time of the 2003 TV series, these censorship policies had been abolished, and no changes have occurred in the content of the show. The name "Teenage Mutant Ninja Turtles" remained unchanged for the 2003 TV series. As a result, in the UK, the 1987 TV series is still called Teenage Mutant Hero Turtles and the 2003 TV series is called Teenage Mutant Ninja Turtles, hence a disambiguation between the two TV series.
On May 25, 2009, Lionsgate Home Entertainment released the 25th Anniversary Collectors Edition on Region 2 DVD in the UK. This 3-Disc set contains all the episodes of Seasons 1 and 2 and 4 episodes from the final season, as well as a 1-Disc DVD with the first few episodes of Season 1. This release features the original, unedited episodes under the Ninja Turtles title, and also marks the first time the show has been released uncensored in the UK.