#30: Star Trek: First Contact (1996)
The Borg travel back in time intent on preventing Earth’s first contact with an alien species. Captain Picard and his crew pursue them to ensure that Zefram Cochrane makes his maiden flight reaching warp speed.
#29: Predestination (2014)
For his final assignment, a top temporal agent must pursue the one criminal that has eluded him throughout time. The chase turns into a unique, surprising and mind-bending exploration of love, fate, identity and time travel taboos.
#28: Hot Tub Time Machine (2010)
A malfunctioning time machine at a ski resort takes a man back to 1986 with his two friends and nephew, where they must relive a fateful night and not change anything to make sure the nephew is born.
#27: Somewhere in Time (1980)
A Chicago playwright uses self-hypnosis to travel back in time and meet the actress whose vintage portrait hangs in a grand hotel.
#26: About Time (2013)
At the age of 21, Tim discovers he can travel in time and change what happens and has happened in his own life. His decision to make his world a better place by getting a girlfriend turns out not to be as easy as you might think.
#25 The Time Traveler’s Wife (2009)
A Chicago librarian has a gene that causes him to involuntarily time travel, creating complications in his marriage.
#24: The Time Machine (2002)
Hoping to alter the events of the past, a 19th century inventor instead travels 800,000 years into the future, where he finds humankind divided into two warring races.
#23: It’s a Wonderful Life (1946)
An angel is sent from Heaven to help a desperately frustrated businessman by showing him what life would have been like if he had never existed.
#22: Donnie Darko (2001)
After narrowly escaping a bizarre accident, a troubled teenager is plagued by visions of a man in a large rabbit suit who manipulates him to commit a series of crimes.
#21: Star Trek (2009)
The brash James T. Kirk tries to live up to his father’s legacy with Mr. Spock keeping him in check as a vengeful Romulan from the future creates black holes to destroy the Federation one planet at a time.
#20: X-Men: Days of Future Past (2014)
The X-Men send Wolverine to the past in a desperate effort to change history and prevent an event that results in doom for both humans and mutants.
#19: Minority Report (2002)
In a future where a special police unit is able to arrest murderers before they commit their crimes, an officer from that unit is himself accused of a future murder.
#18: Frequency (2000)
An accidental cross-time radio link connects father and son across 30 years. The son tries to save his father’s life, but then must fix the consequences.
#17: The Butterfly Effect (2004)
Evan Treborn suffers blackouts during significant events of his life. As he grows up, he finds a way to remember these lost memories and a supernatural way to alter his life by reading his journal.
#16: Galaxy Quest (1999)
The alumni cast of a space opera television series have to play their roles as the real thing when an alien race needs their help. However, they also have to defend both Earth and the alien race from a reptilian warlord.
or #17 (#14?)