 
     
        | Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S2018E01 | What Do Stars Sound Like? | January 10, 2018 PBS | 15 | |
| S2018E02 | Horizon Radiation | January 17, 2018 PBS | 15 | |
| S2018E03 | The End of the Habitable Zone | January 24, 2018 PBS | 15 | |
| S2018E04 | Kronos: Devourer Of Worlds | January 31, 2018 PBS | 15 | |
| S2018E05 | What is Energy? | February 14, 2018 PBS | 15 | |
| S2018E06 | The Death of the Sun | February 21, 2018 PBS | 15 | |
| S2018E07 | The Trebuchet Challenge | February 28, 2018 PBS | 15 | |
| S2018E08 | Should Space be Privatized? | March 7, 2018 PBS | 15 | |
| S2018E09 | Hawking Radiation | March 15, 2018 PBS | 15 | |
| S2018E10 | Scientists Have Detected the First Stars | March 21, 2018 PBS | 15 | |
| S2018E11 | The Andromeda-Milky Way Collision | March 28, 2018 PBS | 15 | |
| S2018E12 | The Unruh Effect | April 4, 2018 PBS | 15 | |
| S2018E13 | Physics of Life | April 11, 2018 PBS | 15 | |
| S2018E14 | Using Stars to See Gravitational Waves | April 18, 2018 PBS | 15 | |
| S2018E15 | Black Hole Swarms | April 25, 2018 PBS | 15 | |
| S2018E16 | The Star at the End of Time | May 2, 2018 PBS | 15 | |
| S2018E17 | How Gaia Changed Astronomy Forever | May 9, 2018 PBS | 15 | |
| S2018E18 | Noether's Theorem and The Symmetries of Reality | May 16, 2018 PBS | 15 | |
| S2018E19 | Why Quantum Information is Never Destroyed | May 23, 2018 PBS | 15 | |
| S2018E20 | What Survives Inside A Black Hole? | June 13, 2018 PBS | 15 | |
| S2018E21 | The Black Hole Information Paradox | June 20, 2018 PBS | 15 | |
| S2018E22 | How Asteroid Mining Will Save Earth | June 27, 2018 PBS | 15 | |
| S2018E23 | Will A New Neutrino Change The Standard Model? | July 4, 2018 PBS | 15 | |
| S2018E24 | Quantum Invariance & The Origin of The Standard Model | July 11, 2018 PBS | 15 | |
| S2018E25 | The Misunderstood Nature of Entropy | July 18, 2018 PBS | 15 | |
| S2018E26 | Reversing Entropy with Maxwell's Demon | July 25, 2018 PBS | 15 | |
| S2018E27 | How Close To The Sun Can Humanity Get? | August 1, 2018 PBS | 15 | |
| S2018E28 | Quantum Theory's Most Incredible Prediction | August 15, 2018 PBS | 15 | |
| S2018E29 | How Will the Universe End? | August 23, 2018 PBS | 15 | |
| S2018E30 | Is There Life on Mars? | August 30, 2018 PBS | 15 | |
| S2018E31 | The Black Hole Entropy Enigma | September 5, 2018 PBS | 15 | |
| S2018E32 | How Much Information is in the Universe? | September 12, 2018 PBS | 15 | |
| S2018E33 | Quantum Gravity and the Hardest Problem in Physics | September 20, 2018 PBS | 15 | |
| S2018E34 | How to Detect Extra Dimensions | October 3, 2018 PBS | 15 | |
| S2018E35 | Computing a Universe Simulation | October 10, 2018 PBS | 15 | |
| S2018E36 | What are the Strings in String Theory? | October 18, 2018 PBS | 15 | |
| S2018E37 | Will We Ever Find Alien Life? | October 25, 2018 PBS | 15 | |
| S2018E38 | Supersymmetric Particle Found? | November 14, 2018 PBS | 15 | |
| S2018E39 | Why String Theory is Right | November 7, 2018 PBS | 15 | |
| S2018E40 | Are Virtual Particles A New Layer of Reality? | October 31, 2018 PBS | 15 | |
| S2018E41 | 'Oumuamua Is Not Alien | November 21, 2018 PBS | 15 | |
| S2018E42 | Did Life on Earth Come from Space? | December 6, 2018 PBS | 15 | |
| S2018E43 | Quantum Physics in a Mirror Universe | December 12, 2018 PBS | 15 | |
| S2018E44 | Why String Theory is Wrong season finale | December 20, 2018 PBS | 15 | 
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