| 1 | Was there a beginning of time? (Part 1) - Hubble's law and the Big Bang
- The cosmic microwave background
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| 2 | Was there a beginning of time? (Part 2) - The Friedmann universe
- Beyond the Big Bang
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| 3 | Are there parallel universes? - The level I multiverse
- The level II multiverse
- The level III multiverse
- The level IV multiverse
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| 4 | Do aliens exist? - Where are they?
- They're here!
- They exist but haven't communicated yet
- We are alone
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| 5 | Is time travel possible? - Special relativity
- General relativity
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| 6 | Towards a theory of everything - A brief history of physics
- Quantum gravity
- String theory
- Alternatives to string theory
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| 7 | Musings on the theory of everything and reality - Types of existence
- Mathematical universe hypothesis
- Appendix: Occam's razor
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| 8 | The nature of reality - The mathematical universe hypothesis
- The level IV multiverse (cont.)
- The simulation argument
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