Absentee Actor: Virgil and Norman do not appear in "Snakes and Laddies" (although both are still mentioned). To an extent, "Werewolves of Dunneglen," too. They do show up, but they've been arrested as murder suspects and spend the whole episode in jail while Max deals with the Monster of the Week on his own.
Keep Circulating the Tapes: The series is sadly hard to find these days, at least in physical copy. The full series is up on YouTube with the permission of the rights owners. It was last rerun on the USA Network's Action Extreme Team block in the mid 90s.
Near the end of the toyline's run there were plans for three large "Mega Head" playsets. Of the three, only "Mighty Max Assaults Skullmaster" was actually released. There was also one based on Skullmaster's minion Warmonger, and one called "Doom" which is based on an unknown villain (but not the Doom Dragon). These other two Mega Heads were advertised and even had working prototypes made for them, but they were never actually put into production.
It's been revealed there was also a planned fourth toyline called "Into the Battle Zone" that would've aged Max up a few years and had him and the other characters carrying guns around. From what can be seen it looks like it was trying to cash in on the trends governing gritty 90's comic books. Full details can be found elsewhere, but a few of the highlights include...
Vehicles, called Battle Wheels.
More of an emphasis on spring-loaded projectiles in the toys.
The previously mentioned Mega Heads, retooled as "Battle Fortresses".
Many more heroes and villains. There were planned to be eight sets of four (32 total characters), presumably with four villain sets and four hero sets. Of the eight, only four of the Figure Packs are known. They are Skullmaster's Marauders, Norman's Heroes, Max's Avengers, and The Dark Company.