The Batman's 4th season guide

Original Airdate - September 23rd, 2006 - Fourth Season Premiere

When the circus comes to Gotham, ruthless crime boss Tony Zucco demands protection money from the Flying Graysons, a family of trapeze artists. They refuse to pay and Zucco exacts revenge, leaving, Dick, the youngest Grayson an orphan. Having experienced a similar tragedy himself, Batman is driven to take down Zucco and in the process discovers an unexpected bond with Dick.

Episode #41 - Team Penguin

Original Airdate - September 30th, 2006

After countless humiliations at the hands of the Batman, Penguin realizes that while he may not be able to take down the Dark Knight alone an all-star team of Gotham's most dangerous villains might just do the trick. While trying to stop this powerful force Batman must deal with team building issues of his own as Batgirl and Robin meet for the first time.

Episode #42 - Clayfaces

Original Airdate - Unknown

Shape-shifting villain Clayface turns himself in, promising to give up his criminal ways and hoping to earn a second chance for his alter ego, Ethan Bennett. But when a new Clayface takes to the streets of Gotham, Ethan wants to prove his worth as a hero by helping take down this threat. Having been burned in the past by a seemingly reformed Ethan, Batman isn't sure his friend can still be trusted.

Episode #43 - The Everywhere Man

Original Airdate - Unknown

When evidence from a series of art thefts by a new costumed villain with the power to replicate implicates a close friend, Batman believes there must be another explanation. Now the Dark Knight must unmask the identity of this rouge called the "Everywhere Man" and prove his friend's innocence.

Episode #44 - Strange New World

Original Airdate - Unknown

Professor Strange unleashes a deadly toxin on all of Gotham, turning its entire population into zombie-like creatures. With the fate of the city in his hands, Batman must overcome incredible odds to find an antidote before the condition is rendered permanent.

Episode #45 - The Breakout

Original Airdate - Unknown

When notorious crime boss Black Mask is captured, his organization works to break him of out jail. But when Batman is sidelined, Batgirl and Robin must prove they can be heroes on their own and stop Black Mask.

Episode #46 - Artifacts

Original Airdate - Unknown

One thousand years into the future Gotham City is terrorized by a dangerous villain from its past. Can the city defend itself from such a threat without the Batman?

Episode #47 - Two of A Kind

Original Airdate - Unknown

After Batman takes down Punch and Judy, Joker takes an interest in the TV pop psychologist Harley Quinn and decides to groom her as his new partner in crime.

Episode #48 - Seconds

Original Airdate - Unknown

After a seemingly ordinary criminal continues to get the better of Batman and his partners it is discovered that he has the ability to travel back in time by several seconds. Batman is now faced with the seemingly impossible task of stopping a foe that knows his every move before even Batman himself does.

Episode #49 - Riddler's Revenge

Original Airdate - Unknown

Stuck at the bottom of the ocean with Riddler and no hope of escape, Batman learns he may have played an important role in the creation of this dreaded foe and helps solve a long lingering mystery.

Episode #50 - Rumors

Original Airdate - Unknown

A new vigilante, one playing for keeps, comes to Gotham, with his sights set on taking down the city's major villains permanently. Now Batman finds himself in the unusual position of having to protect some of his greatest enemies from this deadly threat.

Episode #51 - The Joining, Pt. 1

Original Airdate - Unknown

John Jones, a new detective in Gotham, hints that he may know Batman's secret. Batman must uncover this mysterious figure's true identity and whether he is a friend or a foe. The answers prove shocking.

Episode #52 - The Joining, Pt. 2

Original Airdate - Unknown