Darkness - symbolizes ignoring of truth or fact, the subconscious, and the unknown. Darkness also hides one's surroundings, and so darkness in a dream could indicate that you feel you are. or someone else is, 'in the dark' about something and need to find, or face, the truth.
It may also suggest that you are experiencing or learning something about yourself that you didn't know, or don't want to know...and you don't like it.

Strangers - If the person reminds you of someone you know.. think about your relationship with him or her, and the issues that the dream has brought up, or how you relate to the person that is being represented. If these people are totally unrecognizable (they don't remind you of anyone you know)... they would represent different, and unknown, aspects of yourself. They are extensions and projections of your own subconscious, and personality. Alternately, a stranger may represent an unknown fear, or danger, you feel in your waking life.

Held captive - Dreaming about being imprisoned, locked in a room, tied up, or restrained against your will can be a powerful dream image.
Being held by someone unknown, for an unknown reason suggests you feel as though you are a victim of circumstances beyond your control, or that you feel 'tied down' to a person or a responsibility, that you have no freedom.
Alternately, it could suggest you feel guilty for something that happened in the past... a past sexual indiscretion, repeating bad gossip about someone,,,anything that you now regret.

Dreaming about rape, or the possibility of it, is a nightmare that inflicts fear and anxiety upon recall. Since rape is a brutal and deeply personal violation, it suggests that the dreamer may be feeling robbed of options and negated as a human being. In a dream, as in real life, rape has very little to do with sex. It is about power, control, anger, and other very destructive emotions. In order to understand this dream, you may need to think about the areas of your life that causes you great anxiety and fear. It may also be a warning from your subconscious to take precautions, protect yourself emotionally and physically and don't engage in careless behavior.

Being cut - suggests a vital change being made in yourself or your life, an emergency of emotional or physical nature, or the release of deeply buried feelings or tension.
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Is someone trying to make you do something you don't want to do?
Is there anyone who is trying to prove their power over you?
Is there a part of yourself that is causing you to feel out of control...a bad habit, selfishness, gossip, etc?

Hope I could help, good luck!