Spot changes sex here - the cat was identified as a "he" a few episodes previously in "Phantasms," but here Data keeps referring to Spot as a "she."
Picard tells Worf to fire at the Ferengi weapon array, but in the next shot he hits their bridge instead.
(after Data pulls out a ball of yarn for Spot to play with)
Geordi: Well, I don't know about Spot, but seems to me that your training is coming along fine.
(trying to train Spot)
Data: Spot. This is down. Down is good. This is up. Up is no.
(talking about Data training his cat)
Data: Unfortunately, I have been less than successful.
Geordi: I've got an idea. How about a phaser? A low-stun setting at just the right moment might do the trick.
Data: Geordi, I can not stun my cat.
Geordi: I was kidding, Data.
The warp 5 "speed limit" implimented at the end of this episode would remain in effect for the remainder of the series, however it is generally assumed that an "environmentally friendly" warp drive was developed very shortly after that.