• Vincent Kartheiser denied allegations of on-set misconduct during production on Season 3 of "Titans"
  • Warner Bros. Television received at least two complaints against the actor and launched two internal investigations, a report says
  • The allegations included disruptive, juvenile behavior and inappropriate comments

Vincent Kartheiser was the subject of two internal investigations triggered by allegations of on-set misconduct on the Season 3 set of the DC series "Titans," a report has said.

The "Mad Men" alum — who plays Dr. Jonathan Crane (a.k.a. Scarecrow) on the HBO Max series — was investigated by Warner Bros. Television's Labor Relations department after multiple allegations were made against him, including disruptive, juvenile behavior and inappropriate comments, Deadline reported. A rep for the 42-year-old actor has since denied the allegations.

Unnamed sources told the outlet that the department interviewed relevant parties and conducted investigations remotely due to COVID-19 protocols preventing investigators from traveling to the "Titans'" set in Toronto, Canada.

The first investigation was launched into a complaint about verbal comments and outbursts, and it concluded that Kartheiser's actions didn't rise to the level of termination, according to Deadline's sources. However, the actor was reportedly verbally reprimanded by the studio on behavioral matters.

The studio received a second complaint regarding Kartheiser's behavior weeks later, when Season 3 production was about to wrap. Another investigation was launched, but this time it concluded with a representative being assigned to the set to monitor his activities, according to the outlet.

Other misconduct allegations were also made against Kartheiser in the complaints and investigated by the studio's Labor Relations department, but they were not corroborated, sources told Deadline.

In a statement to the outlet Friday, a spokesperson for the actor said, "Vincent Kartheiser vehemently denies the allegations. Warner Bros investigated this matter and made clear to Mr. Kartheiser its expectations for behavior on the set, and he agreed to comply with their directives."

Kartheiser's character, Scarecrow, is an inmate at Arkham Asylum who used to terrorize Gotham City using toxins to exploit his enemies' phobias. Scarecrow has already appeared on several DC titles, including "The Adventures of Batman," "Harley Quinn" and "The Lego Batman Movie."

Charlie Tahan played the same character on "Gotham." Meanwhile, Cillian Murphy portrayed the role in Christopher Nolan's film "Batman Begins."

Kartheiser was only one of the three new characters introduced in "Titans" Season 3. Savannah Welch also joined as former Batgirl, Barbara Gordon, while Jay Lycurgo plays Tim Drake, the streetwise kid who is better known as Batman's third Robin, Entertainment Weekly reported.

Kartheiser signed a one-year deal with the production and is not expected to return if "Titans" is renewed for Season 4. He is best known for his character Pete Campbell on AMC’s "Mad Men." He also appeared on several other series, including "Casual and The Path," "Saints & Strangers," "Das Boot" and "The OA."

Vincent Kartheiser
Actor Vincent Kartheiser portrays advertising executive Pete Campbell on "Mad Men." REUTERS