Quantum Leap – Justice [4.4]

Sam leaps into Clyde (no last name given) just as he is being inducted into the Ku Klux Klan. Sam is revolted and soon discovers that Clyde himself is conflicted about it, feeling pressured to join because of his family. Sam soon discovers that he is there to prevent the forthcoming lynching of a young black activist named Nathaniel Simpson. His efforts to prevent violence ultimately fail, and in the end Sam is only able to save Nathaniel by insisting he be hung next to him–something the Klansmen, particulalry his father-in-law, are unwilling to do.

Star Trek: The Next Generation – Starship Mine [6.18]

While the Enterprise is undergoing maintenance that requires it to be empty, a group of mercenaries attempt to steal an engine waste product to see it as a weapon.  Only Picard, who by a coincidence is back on board, is free to attempt to stop them. 

Star Trek: The Next Generation – Peak Performance [2.21]

The Enterprise takes part in some war games, with Riker and a skeleton crew having to engage in mock combat against her in an out-of-date ship.  These games are interrupted by the sudden arrival of some greedy Ferengi