TLC filed the lawsuit against Jon Gosselin last month, claiming the Jon & Kate Plus 8 star violated his contract agreements by making TV appearances without the network’s permission. Gosselin is scheduled to appear in court on December 14. TLC has filed subpoenas for his girlfriend, Hailey Glassman and friend Michael Lohan, as well as Gosselin’s lawyer, bodyguard and talent agent, to also appear in court as witnesses against him.

Michael Lohan, who has stirred up controversy himself in an ongoing battle with daughter Lindsay Lohan, has been called in to testify about business dealings with Jon Gosselin. Lohan has publicly stated he was working on an idea for a reality show about divorced dads with Gosselin at one point.

As for Hailey Glassman, she could prove bad news for her on-again, off-again boyfriend. Obviously she has no problems talking about things that make Jon Gosselin look bad in the press. Just recently, Glassman appeared in a TV interview and called Gosselin “emotionally abusive” and prone to “mantrums”.

>> Previously: Kate Gosselin Admits Part of Her Still Loves Jon