When it comes to "Star Wars" and "Star Trek," there's a lot of material from both franchises that's fair game for harsh criticism. Both properties have endured for several decades with beloved adaptations...and less than stellar outings. Well, in a new Twitter war of words between William Shatner ("Star Trek's" Captain Kirk) and Peter Mayhew ("Star Wars'" Chewbacca), they reopen some of their franchises wounds -- lovingly, of course.

In honor of the anniversary of the goofy-as-hell "Star Wars Holiday Special" -- which released 38 years ago today, on November 17, 1978 -- Shatner took to Twitter to jab the "Star Wars" outing for its lackluster plot, tagging stars Mark Hamill, Carrie Fisher and Mayhew in a post.

Mayhew promptly responded, expressing similar sentiment for the Shatner-directed "Star Trek V: The Final Frontier," writing the following:

A follow-up to the beloved Leonard Nimoy-directed "Star Trek IV: The Voyage Home," "The Final Frontier" was panned by critics across the board and was, deservingly, a box office failure. The film is remembered for its rough special effects, nonsensical plot and undermining of its lead characters (we're sorry, Scotty -- still).

Shatner is even on the record acknowledging that the film is one of the weaker "Star Trek" movie outings. He once said, "I did not get the help I needed in allocating my budget...[S]o when it came to shooting the ending — needing a good villain and lots of computer graphics — I had run out of money. Sorry about that. [Laughs.] I had to use footage that I had already shot — and spit on it a lot. I wanted to give [the audience] earth-breaking granite monsters spewing rocks and fire. Instead, I had a few pebbles in my hand that I threw at the camera.”

What say you, readers -- is "Star Trek V" worse than the "Star Wars Holiday Special"? Sound off with your thoughts in the comments!