1. Technician
2. Observer
3. Cub
4. Computer
5. Timer
6. Life-Plotter
7. Prelude to Crime
8. Crime
9. Interlude
10. Trapped!
11. Full Circle
12. The Beginning of Eternity
13. Beyond the Downwhen Terminus
14. The Earlier Crime
15. Search through the Primitive
16. The Hidden Centuries
17. The Closing Circle
18. The Beginning of Infinity
