In a program such as ‘Doctor Who’, the language is mostly formal but it can be informal sometimes. In a program such as ‘Hollyoaks’ the language is mostly informal but can be formal sometimes. There is very little swearing in both programs (unless you count the late night spin off ‘Hollyoaks Later’). Slang isn’t used much in both programs, but it’s used more in ‘Hollyoaks’ than it is in ‘Doctor Who’.
Also target audience comes into it too. The target audience of ‘Hollyoaks’ is mostly teenagers. The target audience of ‘Doctor Who’ is mostly families, fans of the show, science-fiction, fantasy, drama, action and adventure fans. Also most of ‘Doctor Who’s’ audience are intellectual as the program itself is quite intelligent with the length of the words and sentences it uses and it’s fast paced nature, also it’s complicated and confusing plots, some of them everyone will understand, some of them no one will understand, and some of them only certain people will understand (mostly fans who have seen most episodes, even the 60’s, 70’s and 80’s ones). ‘Doctor Who’ is much more complicated and confusing nowadays than it used to be.