Revealing mistake: The phone booth has no cables underneath, revealing it's a prop.
Revealing mistake: The underwater scenes of Wonder Woman are supposed to take place in the ocean, but it's very obviously a swimming pool with drain holes and a light niche.
Revealing mistake: When the scientist melts and collapses on the table, the wires controlling the dummy are visible.
Mind Stealers from Outer Space: Part 2 - S2-E11
Revealing mistake: Before Skrill breaks the log fence, one can see it's already cut.
Mind Stealers from Outer Space: Part 1 - S2-E10
Revealing mistake: When Skrill busts through the door, it has no hinges, revealing it's a prop to allow for the stunt.
Mind Stealers from Outer Space: Part 1 - S2-E10
Revealing mistake: When the couple in the woods is paralyzed by the aliens, they can't help but move all the time, and even the woman's arms change positions between shots.
The Man Who Made Volcanoes - S2-E9
Revealing mistake: The scientists are watching an earthquake on a mountain with a Richter magnitude of 8.4. However, the rocks don't move a single inch, revealing it's a camera trick.
I Do, I Do - S2-E8
Revealing mistake: When Wonder Woman starts running down the golf course chasing the buggy, one can tell it's a stunt woman.
Mind Stealers from Outer Space: Part 1 - S2-E10
Revealing mistake: When the truck rolls down the hill, it crashes against another truck, which happens to match the shiny red colour of the original truck that went over the hill (not the faded red truck that we saw falling). Seemingly, it belonged to a first take.
The Bermuda Triangle Crisis - S2-E4
Revealing mistake: When Wonder Woman spins to transform from her wetsuit back to her costume, it's the previous transformation played backwards. Check how she moves counterclockwise and how her hair moves unnaturally.
The Man Who Could Move the World - S2-E3
Revealing mistake: When Ishida lifts the phone up in the air using his mind, the cable is visible.
The Return of Wonder Woman - S2-E1
Revealing mistake: When Wonder Woman launches the robot away, the actor playing him is swapped for a rubber doll that bends awkwardly.
The Return of Wonder Woman - S2-E1
Revealing mistake: When Trevor's copycat is about to punch Wonder Woman, he is replaced by an obvious stunt double. The shot then cuts to the real actor, which underlines the difference between both.
The Return of Wonder Woman - S2-E1
Revealing mistake: The jet is supposedly taking a nosedive, but one can see the horizon line behind is also tilted, revealing the camera trick.
Revealing mistake: When the helicopter transports the phone booth, the man inside has been replaced with a stiff, unrealistic dummy.
Mind Stealers from Outer Space: Part 1 - S2-E10
Revealing mistake: When Wonder Woman fights against the twin women, they are replaced with two tall stunts with blatant wigs.
Mind Stealers from Outer Space: Part 1 - S2-E10
Revealing mistake: When Wonder Woman is in the woods and leaps upwards to the tree branch, one can tell it's not the real actress but a stunt double. This is also very noticeable during the junkyard chase, too.
Answer: Yes, on the first episode of season 2, she is shown on the island, when another plane crash lands, she says, "They sound different from WW II". Later in the same episode a woman gathers background information on Wonder Woman. The woman says, "From 1942 to 1945, she helped the Allies win the war."