This week on "Justin Hall At The Movies," I'll be reviewing Leonardo DiCaprio, Jennifer Lawrence and an all-star cast as they prepare for the end of the world in "Don't Look Up."

Don't Look Up is a movie that is getting a limited release and then moving to Netflix on Christmas Eve. Writer/director Adam McKay has assembled an all-star cast coupled with a timely premise, but it's not as effective as it would like to be and the tone makes it somewhat difficult to care.

Leonardo DiCaprio and Jennifer Lawrence star as a couple of astronomers who discover a gigantic comet the size of Mt. Everest is on a collision course with Earth.

They try to get the attention of the President (Meryl Streep) to intervene but her advice is to "sit tight and assess." Jonah Hill costars as her son and also works at the White House. Oh, and Lawrence's character is very mad at the fact the general for the Pentagon charged her for snacks that were originally free.

DiCaprio and Lawrence go on a media tour to try and warn the world of the impending danger, but no one takes them seriously. Tyler Perry and Cate Blanchett star as a couple of talk show hosts who respond in jest although Blanchett does take a liking to DiCaprio in more ways than one.

We also get a lot of supporting work from the likes of Rob Morgan who assists the astronomers; Mark Rylance as a Steve Jobs type inventor with a monotonous voice; Timothee Chalamet as a drifter who connects with Lawrence in some effective scenes and even Ron Perlman as a foul-mouthed character who gets chosen to help blow the comet off its trajectory. They each get their moments and sometimes the scenes work.

The problem with the movie is that doesn't know what tone and direction it wants to take. It wants to be a biting satire on climate change and false news while trying to bring a farcical take on the disaster genre.

The humor is only scattershot with only brief moments getting a chuckle at best when it should have us howling. It feels too reserved when it should be more daring. It plays many scenes too safe into going to more risqué territory.

I admired the cast in a lot of scenes, but the overall execution is a letdown. This movie goes out with a whimper instead of a big bang.

Grade: B-

(Rated R for for language throughout, some sexual content, graphic nudity and drug content.)