Morph was produced for the BBC by Aardman Animations, later famous for the "Sledgehammer" music video, Wallace and Gromit and Shaun the Sheep.

These are connected to the main show by having Hart deliver a line or two to Morph, who replies in gibberish but with meaningful gestures.

Most appearances of Morph revolve around his friendship and rivalry with Chas, with each often playing tricks on the other and laughing at each other's misfortune.

After Hart's shows ended, Morph and Chas appeared in shorts on the Children's BBC's successor programme SMart from 1994-2005.

In March 2009, shortly after Hart's death, a flashmob of Morph characters was organised in London outside the Tate Modern art gallery.

On 29 October 2013, Peter Lord (co-founder of Aardman Animations), created a fundraising project on the crowdfunding site Kickstarter.

The target was reached on 6 November 2013 after only nine days, attracting contributions from over 1,700 backers, who received a variety of rewards, including early access to the new animations and a small box of clay used in the production, depending on the individual's level of funding.

In March 2016, it was announced that Sky had made a deal with Aardman Animations to produce new Morph material to be directed at its child audience.

The third series of Brand New Morph made its way to Sky in 2018 and to YouTube on 12 February 2021 until 31 December 2021, with the episodes taking place during some special events that occurred during the year.

The Epic Adventures of Morph made its way to Sky in 2020, with the series re-released on YouTube between 1 April 2022 and 8 July 2022; the episodes' running time was also extended to five minutes.