Tonight in HD: April 18

Californication's David Duchovny

Friends (TV2, 6.30, R)

A desperate Monica agrees to a date with one of her restaurant customers, who turns out to be a billionaire; Phoebe’s half-brother visits and announces he is marrying a much older woman.

Shortland Street (TV2, 7.00)

Jill fears the past, Gabrielle channels old feelings in a new direction; Vasa makes a change for the worse.

Drug Bust (TV3, 8.00)

Season premiere: The Manuwera CIB plan to bust meth-dealers; frontline police officers are confronted by an marijuana grower; a drug-addicted youth decides life on the run has become too much.

Criminal Minds (TV One, 8.30)

The BAU travel to Los Angeles to investigate a series of unusual murders; more of Prentiss’ mysterious past is revealed. What the critics say: TV Fanatic, TV Done Wright.

Desperate Housewives (TV2, 8.30)

Paul’s nefarious plan for Wisteria Lane is put into full effect; Juanita discovers Gaby’s secret; Bree invites Keith to move in with her; Tom is confronted about his past indiscretion with Renee. What the critics say: Television Without Pity.

CSI: Crime Scene Investigation (TV3, 8.30, 5.1)

The CSIs question the validity of an online picture depicting a murdered call girl until they find the same woman strangled to death in the dumpster that appears in the photo. What the critics say: Crave Online, CSI Files.

Castle (TV One, 9.30)

A dead woman leaves clues indicating that the Tripler Killer aka 3XK is back after a four year hiatus. Castle and Beckett play a deadly game of wits with the killer to prevent more killings. What the critics say: Relatively Entertaining, ScreenCrave.

Brothers & Sisters (TV2, 9.30)

Nora flees the nest for a spontaneous Christmas getaway and leaves her very dysfunctional flock to fend for themselves. Richard Chamberlain guest stars. What the critics say: TV Fanatic.

Californication (TV3, 9.30, 5.1)

Season premiere: Resumes three days on from the third-season three finale, with Hank sitting in a jail cell – but the gossip blogs are already buzzing with news of the Hollywood’s latest sex scandal. What the critics say: Slant, Salon, New York Magazine.

Hawaii Five-O (TV3, 11.25, 5.1, R)

Danny’s ex-wife assists Five-0 in a baffling investigation when highly skilled thieves kill two security guards in an armoured car heist but leave behind the money. What the critics say: Alex O’Loughlin Rocks.