Wes calls Velma a "100 year old ghost." Granted, he's under pressure at the time. However, she was killed in 1948, so he's about fifty years off.
Trivia: Elvis Presley did indeed play Binghamton, NY War Memorial Arena the week Star Wars opened (25 May, 1977) as Wes describes. Elvis played Binghampton on the 26th and 27th of that month (wearing the white jumpsuit.) That makes Wes--3 years old in 1977--28 years old.
Elvis Presley was born in 1935 - Jesse Garin (and Michael Philip, the actor who plays him) doesn't look 67 years old here, but he kind of would have to if he were really Elvis' twin brother.
Although King Master Lobo's fangs look fine, some of his minions have vampire teeth where the two incisors are very close together: either the front two upper teeth, or the two teeth to either side of them. The incisors are typically the third teeth to the left or right on the front.
In the last scene in the Chronicle lobby, watch Dennis. One shot shows him at Vera's desk with his left hand holding a bouquet of flowers, up on the counter. The camera cuts to a quick reaction shot of Wes and Tucker watching him, and Dennis' left hand with the flowers has instantly jumped down to his left hip.
Wes talks about drinking punch spiked with sodium pentathol: that drug can only be effectively administered intravenuously.
Wes is slightly out of date on his weaknesses: DC ditched Green Lantern's weakness to the color yellow a couple of years ago, at least with the Kyle Rayner version.
The Nemecoids seem to have a pretty elaborate set-up on Earth, and are able to try and kill clone-Grace several times. So why didn't they just kill the real Grace themselves: why did they need a clone of her to do so?
So what happened to the subplot of Evelyn trying to have Grace committed? She has the requisite three signatures, and the guys can't really explain what's going on with the clone. Why'd she change her mind?
If Daniel wants the clone-Grace to be at large so that she can lead them to her alien masters, why does he sign the papers to have her committed?
Pig Boy's tracker display shows the target going into "Itchycoo Park", but from other locations on the map (Grand Central Station, Museum of Modern Art, St. Patricks Cathedral), "Itchycoo Park" is located in a non-park area in Manhattan, on the east side, bounded by Lexington Avenue, 46th Street, 1st Avenue, and 57th Street. This fictional park is southeast of the real Central Park.
Since Sal (presumably) fried the tracking chip in Monica, how did Elias and his team find her so quickly when they go out for a walk?
Given that Grace was fully dressed, exactly how did the 1' round STA exit her body so quickly? *ahem*
When Tucker Burns walks through the endless corridor in the archives, he looks at strange samples on both sides, put away on shelves. At one point we see a sample on the right side, labeled F-2 but with the writing reversed: obviously a "left side" shot flipped to the right side to make it look like Tucker was looking at both side of the corridor, while they were filming only one.