When the first run of an inventor's newly-constructed Hypercar begins to malfunction, Scott must try to find a way to slow down the fast-moving ride.
- Scott Tracy - Rasmus Hardiker
- Virgil Tracy, Gordon Tracy - David Menkin
- Brains - Kayvan Novak
- Grandma Tracy - Sandra Dickinson
- Tycho Reeves - David Tennant
- Keiko Murakami - Emily Atkins
- Toshi Murakami - Togo Igawa
- Gertie Bunson - Lorelei King
- Technician - Laura Reed
Scott: "Any luck figuring out what's gone wrong, Brains? Brains?"
Tycho: "I think your friend may be a tad, starstruck."
Brains: "I'm your n-number 1 fan."
Scott: "Well, Brains, if you ever want to meet Tycho in person, we better figure out how to stop his car."
Gertie: "We've been told to evacuate the platform as Thunderbird 1 lands, but we're not gonna miss a chance to bring you this thrilling live shot of- whoa!" (gets blown away by Thunderbird 1's engines) "Let's move back a bit, shall we?"
Tycho: "I bet you didn't know you'd be getting a demonstration of our collision protection system, eh?"
Toshi: "I feel like a balloon animal."
Gordon: "Um, are we sure this is a good idea?" (Thunderbird 4 gets launched backwards) "Bad idea, bad idea!"
Virgil: "Let's hope you guys make a slower, gentler exit."
Gordon: "Hey, I'm nothing if not gentle. Brace for impact!"
Gertie: “Scott Tracy, any chance we could get a quick interview?” (Scott starts Thunderbird 1’s engines) “You know what, never mind. Another time... maybe.”
International Rescue Equipment used
Non International Rescue Equipment Used
- This episode borrows plot elements from Brink of Disaster. Also, this episode is somewhat similar to Runaway.
- This is the first time Scott is seen aboard Thunderbird 4.
- Thunderbird 4's turbines are modified to act as afterburners, much similar to its classic counterpart.
- This is the second time that Thunderbird 4 has been used in an unconventional manner, after the events of Heavy Metal.
- This is the second time that Thunderbird 2 has lowered its module and opened the flap in flight in order to catch a craft falling from through the sky (the first occurrence of this was catching FAB 1 in Clean Sweep).
- Scott refuses to give an interview to a journalist (in quite a humorous manner). Of course, in the classic series, International Rescue was not to be filmed under any circumstances.
- This is the first episode since Ring of Fire Part 2 to use a different closing theme instead of the 'closing titles' march.
- The Tycho Reeves character is a parody of Elon Musk and his Hyperloop concept.
- This is the first time a non-English line (Japanese) was used in the episodes.
- Tycho says that the Hypercar is travelling at seven times the speed of sound (Mach 7) and later Brains says that the speed is Mach 8. Scientifically, these statements are meaningless since the medium through which the Hypercar is travelling is a vacuum and the speed of sound in which would be zero. Contrary to popular belief, the speed of sound varies depending on the medium through which the sound is projected, amongst other variables.
- Alternatively, he could be referring to the speed of sound as a constant value, approximately 767mph, with Mach 8 being in excess of 6000mph. However, this wouldn't be fast enough to cause the "atmospheric heating" effect seen as Thunderbird 4 was leaving the tunnel, as re-entry speed itself is defined as Mach 25 and above, while Thunderbird 4 would logically be travelling much slower than Mach 8 due to the tunnel no longer being a vacuum at the time.
- The Hypercar may be a reference to one of Gerry Anderson's TV series, Supercar.
- Some sceneries in the episode are reused from the previous episodes (Attack of the Reptiles, Tunnels of Time, Legacy).
- Both Igawa And Tennant have appeared on Doctor Who.
- This episode marks the introduction of Mini-Max.
- When Gordon tries to catch up to the Hypercar, he shoots a harpoon. However, in every scene after this, the harpoon is missing. Gordon has not detached the harpoon in those scenes either, as he says after rescuing everyone, 'Harpoon detached'.