2152 (Columbia)

January

Unknown: Captain Archer and Ensign Mayweather find themselves imprisoned in a Suliban internment camp run by the Tandarans. (ENT 21: "Detained")
Unknown: A strange, symbiotic alien creature boards Enterprise and starts kidnapping members of the crew. (ENT 22: "Vox Sola")

February 9: Enterprise finds itself under attack while transporting a controversial Vulcan ambassador. (ENT 23: "Fallen Hero")
February 12: Commander Tucker and Captain Archer are invited to a desert planet by a man named Zobral, only to discover that he has ulterior motives. (ENT 24: "Desert Crossing")
February 18: Enterprise finally arrives for shore leave on Risa. While there, the crew experience more than they are later willing to admit. (ENT 25: "Two Days and Two Nights")
February 25: (ENT: "What Price Honor?")

Unknown: "Cabin E-14" (Strange New Worlds VI) (ENT)
Unknown: Enterprise is recalled to Earth after the crew is blamed for the accidental destruction of a colony world. En route, it is hijacked by the Suliban and Captain Archer is trapped in the future.(ENT 26: "Shockwave")
Unknown: As a group of Suliban take over Enterprise, Captain Archer tries to return to the 22nd century. (ENT 27: "Shockwave, Part II")

April 15: Sub-Commander T'Pol relates the tale of a Vulcan crew stranded on Earth in the 1950s. (ENT 28: "Carbon Creek")
Unknown: Enterprise snags a cloaked mine and Lieutenant Reed and Captain Archer race to disable it during first contact with the Romulan Star Empire. (ENT 29: "Minefield")
Unknown: Heavily damaged by the Romulan mine, Enterprise is repaired by an unmanned, automated, and apparently sentient alien repair station. (ENT 31: "Dead Stop")
Unknown: The Captain's beagle, Porthos, becomes ill from an alien pathogen, and Captain Archer frets in Sickbay waiting for him to recover. (ENT 30: "A Night in Sickbay")
Unknown: "The Shoulders of Giants" (Prologue) (Strange New Worlds V) (ENT/TLE)
Unknown: "Rounding a Corner Already Turned" (Strange New Worlds 09) (ENT)
Unknown: Captain Archer barters for deuterium from a mining colony plagued by Klingon marauders, who seek the fuel as well. (ENT 32: "Marauders")
Unknown: Sub-Commander T'Pol is reactivated as a Vulcan intelligence agent, reawakening a dark secret from her past. (ENT 33: "The Seventh")
Unknown: After an away mission, Lieutenant Reed discovers that his communicator was lost on a pre-warp planet; he and Captain Archer are then captured trying to retrieve it. (ENT 34: "The Communicator")

Unknown: (ENT: "Surak's Soul")
August 14: Enterprise charts a course through a trinary star system to investigate a black hole, and the crew find themselves suffering from a condition that leaves them distracted and obsessed. (ENT 35: "Singularity")
Unknown: After her first trip through the transporter, Ensign Sato finds herself becoming incorporeal, with the crew believing she has perished. (ENT 36: "Vanishing Point")

September 12: While answering a distress call, Commander Tucker is kidnapped along with a demanding alien princess. (ENT 37: "Precious Cargo")
September 18: The Enterprise crew takes refuge inside one of the warp nacelles to avoid fatal exposure to an unavoidable wave of radiation. (ENT 38: "The Catwalk")
Unknown: Commander Tucker is fired upon by an Arkonian ship and is then stranded on a planet with his attacker. (ENT 39: "Dawn")
Unknown: Sub-Commander T'Pol learns she has Pa'nar Syndrome, contracted from her previous mind meld, and faces ostracism from Vulcan society. (ENT 40: "Stigma")
Unknown: "Insanity" (Strange New Worlds 8) (ENT)
Unknown: Captain Archer negotiates a cease fire between the Andorians and the Vulcans. (ENT 41: "Cease Fire")
Unknown: Enterprise finds a derelict ship, only to be attacked by both Suliban and Tholian ships. (ENT 42: "Future Tense")
Unknown: Mistaken as smugglers, Captain Archer and Commander Tucker find themselves on a prisoner transport ship. (ENT 43: "Canamar")
Unknown: Noncorporeal aliens attempt to take over Enterprise. (ENT 44: "The Crossing")
Unknown: "Savior" (Strange New Worlds VI) (ENT)
Unknown: Captain Archer is arrested and imprisoned by the Klingons on charges of conspiracy against the Empire. (ENT 45: "Judgment")
Unknown: "Have Beagle, Will Travel: The Legend of Porthos" (Tales From the Captain's Table) (ENT)