Scooby Doo, Where Are You!
S2E8: Don't Fool with a Phantom (1970)
The gang visits a museum where they learn that a mysterious wax figure has been scaring everyone away. The gang tracks down a former worker who appears to be dealing with some black magic. This episode closed out season two as well as the series for a while and there's no question that it went out on a pretty high note. There's quite a few positive things happening here including Scooby, Shaggy and the gang being at the top of their game and being a lot of fun. This includes countless chases around the museum and especially the one towards the end when Scooby and Shaggy are trying to get away from the wax creature. The "phantom" or wax creature is another major plus as he looks like a big pile a goo and it's actually a pretty cool look. The actual mystery isn't all that hard to figure out but that doesn't take away from the fun.
Episode: A-