So the series keeps up the thrills and action of the earlier entries only this time they actually make reference to the fictional book that the events are based (in, around, on?) although it is not as complete as they would want it to be. There are some interesting depths added to the characters and the situation which although seem slight I feel add weight to the storyline - after all you cannot have the commandos turn up - solve the problem and the world (or time line) to rights again and walk away congratulating each other with out some sort of ramifications. Yes there is more to come - but that is all part of the appeal of a very cleverly through science fiction time travelling adventure.
What do You think about The Zenda Vendetta (1985)?