The plot: Bill Cosby is a retired spy who gets back into the business after his estranged wife reminds him that they're still estranged by pushing a plate of food into his face. Blah, blah, blah, blah, blah. The bad guys are vegetarians, and one guy keeps saying "kill him" for no reason. That's all you really need to know and it'll carry you through any film festival, mostly because Leonard Part 6 will never come up in conversation. If it does, you can just chuckle knowingly and say "I heard that one was really bad." Maybe offer sympathy to those less fortunate than you who have seen it.
Still, Leonard Part 6 is full of nice pre-CGI special effects. They don't look real, but they do look pretty neat. Also cool to see Gloria Foster as a bad guy (gal?) and Joe Don Baker playing an articulate human being for a change. Bill Cosby who wrote the story must have become accustomed to mediocrity, thanks to hocking computers for Texas Instruments. I can't think of any other way to explain the variance of quality in his own material.
It wasn't so bad that I wouldn't watch it again, but it deserves its reputation. This sentence is the only place you'll ever see the phrase "I loved it" in reference to Leonard Part 6. I didn't love it, I'm just sayin'.
I'm still not sure whether I'll be able to sit through The Adventures of Pluto Nash, though.