Star Trek IV: The Voyage Home save Earth from an alien probe, Admiral Kirk and his fugitive crew go back in time to century Earth to retrieve the only beings who can communicate with it, humpback whales.
Deanna Troi [Star Trek] is the ship's psychologist. She is a natural empath and in touch with everyone's feelings. Troi has a lot of sway with higher ranking officers, as her input is valued when decisions are made. She has loved William Riker and Worf.
Star Trek: Nemesis ~ "After the Enterprise is diverted to the Romulan planet of Romulus, supposedly because they want to negotiate a truce, the Federation soon find out the Romulans are planning an attack on Earth.