Josie and the Pussycats was a fun, mostly successful attempt to combine the teen music approach of the Archies with the "meddling kids" adventures of Scooby-Doo, except that, in the tradition of the Beatles Help!, Josie and her gang stumbled onto evil masterminds and criminal organizations instead of ghostly mysteries.
This episode has some of the scariest scenes of the series, especially the appearance of the T. Rex and when D. Madreau devolves his scientific rivals into gorillas, Of course, it's a much lighter approach when the cowardly Alex gets the gorilla treatment. Unlike the other victims, he retains his intelligence, and doesn't even doff his glasses. What's really funny, however, is how he is no more impressive as a gorilla then he was as a human.
It's too bad the Pussycats failed to match the Archie's success in the music charts, because their songs were often fun, as are pretty much all of their adventures.