Tonight in HD: July 27

The Walking Dead (TV2, 9.30)

Friends (TV2, 6.30, R)

Chandler and Monica agree to give each other homemade presents for their six-month anniversary, but neither has anything prepared; Ross tries to teach martial arts to Rachel and Phoebe.

Shortland Street (TV2, 7.00)

Evan renews his interest in Murray’s project; Tracey supports a budding star; Daniel exposes Lana’s treachery.

Survivor: Redemption Island (TV3, 7.30, 5.1)

Eight castaways vie for a spot in the final group that will be questioned by the jury members who vote for the winner.

$#*! My Dad Says (TV2, 8.00)

Ed loses out on a piece of prized baseball memorabilia; Vince and Bonnie’s new living situation with Ed and Henry makes their baby-making efforts more work than romance. Review: CliqueClaque.

Nothing Trivial (TV One, 8.30)

It’s game on as Michelle goes into battle with her ex for what she loves most; Mac takes on his nemesis; Emma breaks her losing streak.

The Big Bang Theory (TV2, 8.30)

When Howard finally breaks the news to his mum that he’s engaged to Bernadette, it lands her in hospital. Reviews: AV Club, IGN.

The Walking Dead (TV2, 9.30)

Season premiere: Rick searches for his family after emerging from a coma into a world terrorised by the walking dead. Morgan and Duane, whom he meets along the way, help teach Rick the new rules for survival. Reviews: Wall Street Journal, Entertainment Weekly, Time, Washington Post.

Sons of Anarchy (TV3, 9.30, 5.1)

As the Sons continue their search for Abel, Jax struggles with a huge moral decision. Reviews: Time, AV Club, What’s Alan Watching?

Undercovers (TV2, 10.30)

Season premiere: Outwardly, Steven Bloom and his wife, Samantha are a typical married couple. Secretly, the two are two best spies the CIA had ever known – and together they prove that marriage is the world’s most dangerous partnership. Reviews: New York Daily News, Los Angeles Times, Time, New York Times.