Doctor Who: Captain Jack
Captain Jack is shown as being very flirtatious. Throughout the show you see that he is bisexual and will flirt with anything in sight however he does seem to be leaning more towards being homosexual.
Stereotypes
Gays : Usually seen as camp and very girly, like 'girl things' like shopping and make overs. They often have feminine voices and are often bullied by straight guys because they are scared of getting hit on by gays.
Lesbians: Seen as very masculine and boyish, having short hair, wearing baggy clothes and playing sports.
Stereotypes
Seen as being confused and not sure if they are gay or straight. People often think they are less capable to maintain a steady relationship as they are attracted to both genders and are sometimes seen as promiscuous.
Ugly Betty: Marc St. James and Justin Suarez
Both Marc and Justin show very stereotypical features of gays as they are both shown to be very feminine and share a love of fashion.
Doctor who: Madame Vastra and Jenny
Jenny and Vastra are a married couple and don't particularly follow the stereotypes of lesbians as they do not show to be very masculine or sporty.
The media has some very stereotypical views of sexuality and some TV shows follow these and others use more realistic representations of different sexualities. This will show some stereotypes of different sexualities and then examples
Stereotype
Often seen as repressing sexual feelings instead of just not feeling them. Some think that asexual people are broken or damaged in some way as 'the purpose of life is to reproduce'. They are often presumed to be homosexual
Sherlock: Molly Hooper
Molly is shown to follow the stereotype of heterosexuals as she is quite feminine and girly.
Merlin: Arthur Pendragon
Arthur is shown to be very masculine and enjoys jousting and sword fighting. Even in medieval times stereotypes are followed.
Stereotypes
Seen as 'normal'. Females are feminine and enjoy shopping etc. Males are masculine and enjoy sport and mending things.
There are not many examples from TV drama of asexual characters. At various times it has been suggested that Sherlock Holmes from BBC Sherlock and The Doctor from BBC Doctor Who are both asexual.
However The Doctor has been shown to have relationships with various people over time and has kissed quite a few others.
Nobody seems sure if Sherlock is asexual or not as there is nothing that clearly states he is.
Another example is Sheldon from The Big Bang Theory. It is suggested that he is asexual though he is in a relationship with Amy.