I am not sure I can say the same for The Masters of Luxor, Anthony Coburn's obscure script (which I read a while back) now brought to life by the rewriting skills of Nigel Robinson and the voices of William Russell as Ian and the Doctor, Carole Ann Ford as Susan and Barbara, and Joe Kloska as everyone else. I'm not at all a fan of Robinson's other work but, presumably with input from Lisa Bowerman as director, he has done his best to make the original script sing - it is very slow, with the Tardis crew not meeting anyone else until the second episode of six, and the only significant guest part not showing up till episode 4. There are lots of blatant circle narratives - run away, get locked up, repeat. The entire story would barely fill a single episode of New Who. The cast give it their all but it's not fantastic material in the first place.
If it had been made, this story could have gone either way. Given decent design and direction, it might have been remembered as a classic. But it's a high risk piece; the special effects needed are challenging (giant pyramids, three types of robot, the Tardis flying through the air) and might have absorbed directorial time from preparing the actors; we could have been looking at a reputation more like the Sensorites.
Actually, of course, if the story had been shown as originally planned, there would have been no Daleks and probably a little later no more Doctor Who. So it's just as well, really.