TAS Season 2 Episode 1 The Pirates of Orion

Plot

On stardate 6334.1, the Federation starship Enterprise is on its way to planet Deneb V when the Vulcan First Officer, Spock (voiced by Leonard Nimoy), contracts the disease choriocytosis and is diagnosed by Chief Medical Officer Leonard McCoy (voiced by DeForest Kelley) with having only days to live. The Starfleet freighter SS Huron is to rendezvous with the Enterprise and deliver medicine direly needed for the cure, when it is attacked by Orion pirates who steal its cargo, which turns out to be primarily a sizable load of dilithium crystals.
The Enterprise follows back on the rendezvous course and finds the battered Huron and its surviving crew. Analysis of the attack leads Captain Kirk (voiced by William Shatner) and his crew to chase the Orion ship in a desperate attempt to recover the cure before time runs out. The Orions, knowing they cannot escape the Enterprise or best them in a fight, plan to destroy both themselves and the Enterprise in order to protect the lie of "Orion neutrality". Kirk meets with the Orion Captain (voiced by James Doohan) on a highly unstable asteroid which the Orions plan to detonate to carry out their plot. Kirk and the Enterprise crew realize the Orion Captain is carrying an explosive trigger in his pack and are able to neutralize it. They recover the medicine to save Spock, capture the Orion Captain (who orders his crew to abort the self-destruct, which would now be a pointless loss of life, and surrender) and retrieve the dilithium crystals.