The Cybermen try to assimilate the Doctor. Big mistake.
The Doctor has to deal with the second oldest character in the history of the series.
Decades before Harley Quinn, the Joker had a decidedly different sidekick.
Steve Gerber created a character that, well, was never fully explained.
Series Finale (Probably)
Season Three, Episode Four
Jimmy and Tom see the Justice League take on some powerhouses in the episodes “Twilight,” “Tabula Rosa,” and “Only a Dream”.
Jimmy and Tom talk more Justice League with the episodes “The Brave and the Bold,” “Fury,” and “Legends”.
Some guy declared himself the Emperor of the United States once.
A superheroine bounces in and out of the Vertigo line and may not exist anymore.