Throughout the year, the Philadelphia Film Society has compiled quite a list of great film series, and beginning on Friday, Dec. 5, the film group invites guests to celebrate the 35th anniversary of the sci-fi classic, "Star Trek: The Motion Picture." Sunday, Dec. 7 officially marks the anniversary of the film's release, but to make this a six-day affair; the PFS in collaboration with Geekadelphia is kicking things off a little early. All of the six pictures will be screened on 35 mm film at the Roxy Theater (2023 Sansom St.).

"Star Trek: The Motion Picture:" The first film of the series features an unidentified alien spaceship flying toward planet Earth. As James T. Kirk begins to wonder about the spacecraft, things get interesting as the Enterprise begins to interact with the invaders. This screening will be hosted by film critic Scott Weinberg and followed by a discussion with Dan Tabor of Geekadelphia. Screening starts at 8 p.m. on Friday, Dec. 5.

"Star Trek II: The Wrath of Khan:" This heavy action flick involves conflict between Kirk and his nemesis, Khan Noonien Singh, as Kirk and the Enterprise crew must stop their adversary's evil ways. This film is hosted by Phil Nobile Jr. of Badass Digest. Screening starts at 8 p.m. on Saturday, Dec. 6.

"Star Trek III: The Search for Spock:" Spock? Where is Spock? Can you find Spock? Probably not, but your eyes can as the crew searches for Spock in hopes that he is not dead. This film is hosted by Chris Cummins of Geekadelphia and includes a trivia game as well as a William Shatner impersonation contest. Screening starts at 8 p.m. on Sunday, Dec. 7.

"Star Trek IV: The Voyage Home:" Humpback whales can save the world. Seriously. Watch as Kirk and Spock travel back to the 20th century and bring whales to the future to stop an alien probe created to destroy planet Earth. This film is hosted by Dan Tabor of Geekadelphia and will include an '80s costume party and trivia. Screening starts at 8 p.m. on Monday, Dec. 8.

"Star Trek V: The Final Frontier:" If you believe in something very strongly, it can make you obsessive, and that's what happens when Spock's half-brother hijacks the Enterprise in the belief that God is located in the center of the galaxy. The film is hosted by Dan Tabor and Chris Cummins of Geekadelphia, and guests are encouraged to come in costume. Screening starts at 8 p.m. on Tuesday, Dec. 9.

"Star Trek VI: The Undiscovered Country:"A war is about to break loose as the Klingdon's Chancellor is assassinated and Kirk and the Enterprise are to blame. The final film of the series is hosted by cartoonist Kelly Phillips and pro wrestler and actor, Eric "The Smoke" Moran which includes a special showing of the new Start Trek Web Series episode, Starship Farragut. Oh, and wine night is the theme too. Screening starts at 8 p.m. on Wednesday, Dec. 10.

Tickets to the screenings cost $8 for PFS members and $10 for nonmembers. For the ultimate fan, the PFS is offering a full series pass that costs $40 for members and $50 for nonmembers. If you like most but not all of the films, guests can also purchase a four-pack pass that cost $28 for members and $35 for nonmembers.