A Space Adventure Hour

La'An is asked to test the holodeck, a new holographic simulator, and requests a murder mystery to solve. The computer builds a story around The Last Frontier, a 1960s science fiction series, using the faces of people who have been aboard the Enterprise. As the case grows more tangled, La'An asks Spock to help. Meanwhile, Scotty struggles alone to power the holodeck as the Enterprise only just escapes a collapsing neutron star. When the safety protocols fail and La'An is trapped, Scotty gets a message through: she must solve the mystery to end the simulation. La'An, who has grown close to Spock during months of dance lessons, realises the Spock beside her is a hologram, and the murderer. The programme ends. La'An advises against approving holodecks for general use yet, Una encourages Scotty to ask for help in future, and at their next dance lesson La'An and the real Spock kiss.