I'm somewhat astonished by all the love for Time Flight.
I love most of the Davison era, and fondly remember watching all of these stories on first transmission, but right from the start it was clear to me that Time Flight was a steaming pile of poo.
After the breathless excitement of Earthshock, and the genuinely shocking death of Adric, the sheer cheapness of the production, the paucity of the script and the flaccid performances of much of the cast came as a huge let down. The awful prehistoric sets didn't help matters either, but the absolute nadir must be the Master's most pointless disguise ever. I mean, who exactly was he disguising himself from?? And why a pseudo oriental mystic??
One of the posters above mentions the shock of Tegan being left behind - all I can say is at the time this didn't seem the slightest bit shocking, and just seemed to me to be the culmination of Tegan wanting to get back to the airport.
To be honest it was more surprising when she turned up again the next season, shoehorned into one of the most absurd coincidences ever scripted in Doctor Who (namely that her cousin just happens to walk into the very same spooky crypt in which Omega is hiding with his Ergon/Chicken - what are the odds?)