In the fifth part of This Is America Charlie Brown, Charlie Brown reads school report to his class about the building of the Transcontinental Railroad. He talks about two railroad companies the Central Pacific and the Union Pacific. Charlie Brown says that workers were needed so youngsters were employed. The two railroad companies had to lay down 10,000 miles of track. The Central Pacific stars out slow because they have the cross the Sierra Nevada mountains. Snoopy's brother Spike appears in this episode and gets a job in one of the towns that was built around the railroad. He is a harmonica player, but he is kicked out. Finally, the two companies are getting closer to the end. The last spike has to be put in. The Governor of California misses so Snoopy drives in the last spike.

The final part of the mini series starts out with Charlie Brown trying to convince Schroeder to let Snoopy in the band for the class project. Schroeder said he is in if he does not go crazy. Schroeder and his band are practicing when Lucy says that they should combine their projects. Her project is on American people. He does not like the idea of combing the projects, but the teacher does.