In the next episode of "Lethal Weapon," Martin Riggs (Clayne Crawford) lets his anger get the better of him once again, and annoys his police partner.

The trailer and promotional photos for the upcoming installment, which is titled "Better Living Through Chemistry," were just released recently, and they show Riggs getting hot under the collar as he goes about his day. When he tries to get his truck out of a parking lot, he suddenly hits the car beside it and makes a scratch.

The driver of the other car sees the mark and confronts Riggs. However, the cop just loses his cool, gets out there, and drives away. In another instance, he gets into a fight with a big guy at a bar. It is a good thing his partner Roger Murtaugh (Damon Wayans) is there to break up the melee.

As they walk to the police car, Riggs asks Murtaugh, "Would you say that I'm more angry or less angry? And there's no wrong answer." His partner answers conclusively, "I would say more angry."

Riggs takes offense to what he said and punches him in the shoulder. Murtaugh is taken aback and says, "You said that there was no such thing as wrong."

Riggs then answers that he lied and that the "old him" would have flipped out and lost his cool. It remains to be seen why Riggs is very angry at the moment.

In the last episode, the cops solved a murder with the help of Leo Getz (Thomas Lennon) and Trish (Keesha Sharp). The killing of the attorney was masterminded by the Chinese Triad gang that wanted to stop him from investigating their dealings with illegal drugs.

"Lethal Weapon" season 2 episode 13 will hit the airwaves on Tuesday, Jan. 16, at 8 p.m. EST on Fox.