It wasn't the same without Tegan, that is for sure! Peri..God they could have picked a better actress. First of all, the actress is not at all American, and she had to concentrate so hard on keeping her accent hidden, she blew off her acting throughout her time on the TARDIS. Made you think: Why didn't they just pick an actual American, just like they picked a real Australian to play the Australian air hostess Tegan. And seeing Peri in that bathing suit was just nasty and to base the whole show on that is just bad. Peter Davison was great as always and it surprised me to catch myself teary eyed to see Turlough go. Once again we get to see the Master played by the master himself, Anthony Ainley, and he's in trouble the whole entire story. The story itself was extremely good, but it's always going to be odd for me since Tegan has and will always be my favorite female companion. I never was a Nicola Bryant fan and probably never will be and once again, I need to make it clear that she was not the best choice for the role and she makes the episodes a little cheesy. But Davison, Ainley, and Strickson are marvelous!