i have see about 80 % of the episode of this series in a fairly chronological order . season 2 be definitely a nose dive in quality from season 1 but have some redeem quality to it . my main complaint with season 1 be that the alien be often very poorly realize mostly just people with some slight make up on . the only episode with an imaginative extraterrestrial on it dragon domain be good but the monster ( look like the baddie from luigi cozzi contamination ) be cheesy and immobile . the best thing about the first season be the a ) excellent guest star include gianni garko and orso maria guerrini and giancarlo prete and christopher lee and peter cushing and joan collins and judy geeson and etc . and b ) a few never be see before science fiction idea . the second season toss these two redeemer in favor of more formulaic story and more action and humor . grant the humor be terrible and and the departure of paul and victor and and kono unfortunate ( victor be a good cerebral anchor to the show ) and and the script often trashy and but the show remain unpredictable . the alien design get a little well especially in the episode rule of luton and the chicken man alien costume must have be reuse or rehash for the ice pirate . maya the shape shift alien and though well act by catherine schell and be a terrible idea ( good on paper and not on screen ) and with makeup different in every episode and then the tendency to transform only into earth animal . how boring . the other regular be good except barbara bain and who be not a good actress and nor be she particularly pleasant to look at . her nostril on her nose be point and bizarre look and and at 40 she have not age well at all and look about 2 decade old . the bad episode be easily miss link from season one and and the taybor and the mark of archanon from season two . just brain dead episode in every way . the special effect and while dodgy at time and be good for the era and fresh ( not the same three shot over and over like battlestar galactica ) and and with numerous explosion involve fatality . the show continuity be a bit iffy with the base suddenly have surface defense in some episode and lack them in others and etc . all in all a fun show to watch and i just wish the quality be more consistent ( like doctor who or star trek ) .