The Nerdvana Annihilation - S1-E14
Corrected entry: In the scene where Leonard threatens to open his production era, we see the Star Trek The Next Generation Geordi LaForge (w/o visor) action figure. The uniform worn by the action figure is only worn by Geordi in Star Trek Generations the movie, not the television series.
Correction: The figure he's holding is a genuine Star Trek figure in the correct packaging. It was produced by Playmates Toys and marketed in the Star Trek The Next Generation packaging as "Lieutenant Commander Geordie LaForge Movie Uniform"