01. The Pirates of Orion
Stardate: 6334.1
With Spock stricken down by a fatal disease, the Enterprise must track down the drug that can cure him before it is too late.
02. Bem
Stardate: 7403.6
The Enterprise crew is joined by a unpredictable alien called Ari bn Bem, an independent observer from the planet Pandro.
03. The Practical Joker
Stardate: 3183.3
The computer of the Enterprise gains partial sentience and starts playing practical jokes on the crew.
04. Albatross
Stardate: 5275.6
Dr. McCoy is arrested and held responsible for causing a plague that ravaged the planet Dramia II, where he performed a mass-innoculation 19 years earlier.
05. How Sharper Than a Serpent's Tooth
Stardate: 6063.4
The Enterprise runs into a being that once visited Earth and influenced the Mayan culture.
06. The Counter-Clock Incident
Stardate: 6770.3
With Commodore Robert April (the first commander of the Enterprise) on board, Kirk pursues a ship plunging into a supernova, and enters a universe where time runs backwards.