While all episodes were in colour, the pilot had originally survived only in black-and-white as a film transfer from the original colour source; however, it was restored into colour using the chroma dots computer colour restoration technique and was aired on BBC Two on 1 January 2010.
While all episodes were in color, the pilot had originally survived only in black-and-white as a film transfer from the original color source; however, it was restored into color using the chroma dots computer color restoration technique and was aired on BBC Two on January 1, 2010.