Tonight in HD: May 10

NCIS: LA's Chris O'Donnell (Left) and LL Cool J

Friends (TV2, 6.30, R)

Chandler and Ross are excited when their friend Gandalf, the ‘party wizard’, announces he is coming to town; Joanna squashes Rachel’s chance at a promotion; Monica is offered an exciting new job.

Shortland Street (TV2, 7.00)

Callum vows to fight; Murray and Wendy face the naked truth about their marriage; Winston reveals too much to Brooke.

Missing Pieces (TV3, 8.00)

Season finale: Sapphire never got to know her dad and last year Missing Pieces provided the tip-off she’d been waiting for; will a son accept his father as a changed man after a 23-year absence?

Grey’s Anatomy (TV2, 8.30, R)

Seattle Grace Hospital is hit with a crisis like no other in its history, and the hospital staff are left fighting for their lives. (Repeat of last season’s two-hour finale.)

NCIS: Los Angeles (TV3, 8.30, 5.1)

The team looks for a hacker who stole Pentagon documents that were uploaded to a blog, before the person gets the decryption code to the wrong people. What the critics say: TV Fanatic.