I guess you could argue that CGI and other effects messed around with DS9's "Trials and Tribblations," in which scenes from the original series Tribbles ep were merged with Jadzia, Worf, Bashir, etc. I thought it was great, though, and when Jadzia sees old style Klingons, saying to Worf, "...THOSE are Klingons????" He replied something like, "...it is a long story..."