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Update, because I didn't think this TVF paper warranted a separate topic. My apologies for the length.

After the triumph of the Alvarez scenario for the K-T boundary extinction event, TVF altered his EPH to include an earlier exploding planet in order to account for an origin of the impactor on Earth.

Without solid dates for the various events offered as evidence for even one exploding planet (not to mention a lack of a mechanism to make a planet explode), TVF is forced to ignore other explanations such as supernovae debris bombardment, cometary debris trails, random rocks passing through, dark companions to the Sun, and various other possible causes.

Showing simultanaeity (sp?) of inferred events can be done, as the authors of The Cycle of Cosmic Catastrophes have shown.

The Violent History of Mars
by Tom Van Flandern
Meta Research Bulletin
March 15 2007 issue
Abstract. With overwhelming evidence now available for the basic correctness of the exploded planet hypothesis, questions arise about the details of the most recent such explosions responsible for shaping Mars and its orbit as we know them today. This study shows that the basic scenario suggested by the evidence and described previously stands up under rigorous scrutiny despite the improbability of passing these new tests by chance. And it allows us to derive specific information about the properties and history of the bodies involved that could only be guessed at heretofore. The solution we adopt is not unique, but satisfies all previous constraints and leads to the present day orbit and rotation period of Mars. "Planet V", the original parent of Mars, was apparently of "helium class", a proposed new class of planets. It had an estimated mass of 2.4 Earth masses, a circular solar orbit at about 1.5 au from the Sun, and two "twin" moons. The inner moon, which later became today's planet Mars, originally had a circular satellite orbit with a period of 20 hours. Tidal locking made that its spin period as well. Outer moon "Body C" originally had a circular satellite orbit with a period of 40 hours and a mass of 86% of that of Mars. Following the explosion of Planet V 65 million years ago, Body C and Mars were left in a mutual, highly eccentric, prograde satellite orbit while continuing to orbit the Sun on an altered solar orbit. Tidal evolution continued until the explosion of Body C 3.2 million years ago, leaving Mars alone in its present solar orbit with relatively high eccentricity for a planet and a prograde rotation period of 1.026 days. Mars today shows the many scars that exhibit this violent history, seen dramatically in the accompanying video.

I found a file from 2002 in the "Mars" folder, called "Tidal Bulges on Mars". Here's a post I'd prepared for another forum and saved within the file.

Tidal Bulges on Mars
by R.C. Hoagland and M. H. Bara
"A revaluation of Mars ancient history is therefore proposed, suggesting that Mars (well after solar system formation) was captured into synchronous orbital lock with a larger planetary companion ('Planet V'), accounting for the clustering of present day water bursts around the former beds of two bi-modally distributed 'Mars ancient oceans' as a direct result."

Hoagland and Bara here refer to the same hypothetical body, 'Planet V', as the original parent body of Mars. They even refer to "synchronous orbital lock" which means that Mars showed the same face to the 'Planet V', just as TVF said. One major difference (at least, I think so) is that Hoagland and Bara say that Mars was captured by 'Planet V', a scenario that TVF probably doesn't embrace. I'm pretty sure that any borrowing of ideas was in the direction from TVF to Hoagland and Bara, although their use of Valles Marineris as evidence for the prior capture of Mars is similar to V.A. Firsoff's idea about the formation of Earth's "tectonic plates".