The joke in 'Let's Kill Hitler' isn't actually a joke about women. It's a joke about how the Doctor thinks he can be rude because he's dying. Likewise, in 'The Bells of Saint John', the Doctor says, "It's a woman" to a monk, who crosses his chest. This is a joke about the monk's ignorance to women. Captain Latimer in 'The Snowmen' suggests that pretty women can't be wise; this is a dig at his Victorian values. These are jokes that are more often used in sitcoms like The Office, but they're used so that you can laugh at the characters, and not with them. I'll actually come back to this point on the next page. It might be out of place to use these ideas in Doctor Who, but it's certainly not victimising anybody for the audience's amusement.