Tonight in HD: September 8

What Happens in Vegas (TV3, 8.30)

Friends (TV2, 6.30, R) ✫✫✫

Monica and Chandler’s wedding arrives; Joey unexpectedly gets a part in a movie about soldiers in World War I, but his famous co-star keeps spitting in his face.

Shortland Street (TV2, 7.00) ✫✫✫

Nicole uncovers Vinnie’s secret; Bella’s good deed turns sour; Sarah loses a vital link to her baby.

Movie: What Happens in Vegas (TV3, 8.30, 5.1, R) ✫✫

Two strangers discover they’ve married following a night of debauchery in Sin City, and one has won a huge jackpot after playing the other’s quarter. When a judge refuses to annul, they devise ever-escalating schemes to get their hands on the money. Cameron Diaz and Ashton Kutcher star. (2007)

Fringe (TV2, 10.30) ✫✫✫✫

The team revisits the past in this follow-up to last season’s “Peter” flashback episode that reveals a poignant period of time for both the Bishops and Olivia. Reviews: Time, IGN, AV Club.

Life on Mars (TV3, 12.05, 5.1, R) ✫✫✫

Ray and Chris are shot by the leader of a vicious gang. When the shooter is then murdered, fingers on both sides of the law point to Sam.

Criminal Minds (TV One, 12.20, R) ✫