Got to thinking some of the weirdest storylines I've seen in my favorite Sci-Fi shows that all involve the dangers of Time Travel. Please add as you all see fit
1. Become your own Grandfathter (Futurama)
2. Name your first child after your first child, who you thought was your best friend while growing up. (Dr. Who)
3. Accidently kill yourself in a future Universe (Futurama)
4. Survive an entire very bad year, only to have it never to have happened (Voyager, Dr. Who)
5. Accidently replace a historical figure with yourself (DS9)
6. Accidently remove a historical figure from the Time Line (TOS)
7. Hook up with Marylin Monroe (Dr. Who, Quantum Leap)
8. Be in a marriage, where both partners never meet in the right order (Dr. Who)
9. Potentially interfere with Saturn V launches (TOS, Dr. Who, Men in Black III)
10. Be the reason you society has people investigating alterations to the timeline (TOS, DS9)
11. Try avoiding explaining to your friends why your people look so different from one century to the next (Star Trek in general)
12. Be the reason no one in Maine goes out doors at night, has large dogs, or keeps old cars around (Quantum Leap)
In Trials and Tribblations, Bashir almost pulled a Fry. Let's see if I'm remembering it correctly: He knew he was named after some mysterious man his grandmother hooked up with who may or may not be his grandfather. When we went back in time, he met a woman with the same name as his grandmother and somehow convinced himself that he was granny's one night stand and that now he was required him to sleep with her to fulfill the predestination paradox.
Not quite as bad as becoming his own grandfather, but he will forever be haunted by the memory that he almost tried. Fry was protected from the haunting memory by his defective brain (caused by being his own grandfather), but Bashir's defective brain was repaired, leaving him with a genetically engineered super brain which will never forget the faintest detail of that memory. Presumably his eventual cause of death will be an ill advised self-lobotomy.
Travel back in time to prevent someone you like from dying, only to return to the present after having failed in the past to find out that you actually succeeded (Back to the future).
Travel forward in time from your normal timeline, and then travel back to a horrible timeline, to find out that by trying to alter the past you helped someone else to alter the past (Back to the future 2).
A kooky thing I want to try in a short story or something is to have the main character walking down the street, having an average day, when all the sudden this guy comes running out of the crowd claiming to be your childhood friend that you have never seen in your life. He knows SOME details about your life, but other details are completely messed up or never happened.
And.. he is asking for your help...
Do you trust him? OR is he a mad man trying to manipulated you into assisting him with murder and terrorism?
Just my thought My only problem is that I have to establish what the main characters "normal life" and "normal" routine is before the mysterious stranger comes leaping out of the bushes. That way, you know exactly what he is saying that is incorrect as he is saying it. It would be cool as part of an established series though