The group are still reeling after the shocking events at the end of the last series. Now rising star Zafar joins the team as they set out to become even stronger in their battle to safeguard the nation. When London comes under terrorist attack Adam is forced to make an impossible decision, Harry must deal with blackmail threats from an old flame, and Fiona faces her own demons when she goes undercover in Syria.

Season 3 Episode 3 - Who Guards the Guards?

Danny and the team must uncover the truth behind an assassination attempt on a famous novelist. Air Date : 25th-Oct-2004

Season 3 Episode 1 - Project Friendly Fire

Tom Quinn has disappeared after shooting his boss Harry Pearce. He also stands accused of assassinating the Chief of Defence Staff. Chairman of the Joint Intelligence Committee Oliver Mace uses this a pretext to launch a punitive investigation of MI5. Zoe, Danny and the team must prove Tom innocent and save the service from government takeover. Air Date : 11th-Oct-2004  Read More

Season 3 Episode 2 - The Sleeper

Harry reawakens sleeper agent Fred Roberts, a renowned chemist and family man. As Fred becomes more deeply involved with deadly terrorists, Tom has a crisis of conscience which could jeopardise his career. Air Date : 18th-Oct-2004  Read More

Season 3 Episode 3 - Who Guards the Guards?

Danny and the team must uncover the truth behind an assassination attempt on a famous novelist. Air Date : 25th-Oct-2004  Read More

Season 3 Episode 4 - A Prayer for My Daughter

The latest round of Middle East peace talks are abruptly halted when a key delegate is killed. With the peace process derailed MI5 starts to investigate a newspaper mogul and renowned Israeli extremist, and a group he's associated with called the November Committee. Can MI5 prevent an assassination attempt on a pro-Palestinian British MP? Air Date : 1st-Nov-2004  Read More

Season 3 Episode 5 - Love and Death

Saturday morning. Danny and Colin practice their firing technique on MI5's gun range. Zoe and her fiancé Will are still madly in love. Ruth watches old movies at home whilst longing for real-life romance. A North Sea mission places additional stain on all relationships... Air Date : 8th-Nov-2004  Read More

Season 3 Episode 6 - Persephone

Zoe is tried for manslaughter when an MI5 operation results in the murder of an undercover police officer. Air Date : 15th-Nov-2004  Read More

Season 3 Episode 7 - Outsiders

While a deadly hacker turns Britain upside down, Danny decides whether to reveal all to Will, MI5 hunts the source down to an Islamic mosque with the help of MI5's best computer programmers. But things get suspicious when Ruth, close onto the tail of the hacker, goes missing and so does a member of the special team... Air Date : 22nd-Nov-2004  Read More

Season 3 Episode 8 - Celebrity

The baby of a celebrity couple is kidnapped and they call in MI5. Fiona goes in undercover to gather more information about the couple against Adam's wishes. Air Date : 29th-Nov-2004  Read More

Season 3 Episode 9 - Frequently Asked Questions

When known mercenary Robert Morgan is spotted at a top-secret disused Soviet arms dump, he obviously has to be brought in for questioning. Is it all right to blackmail innocent people to get the information you want? Is it acceptable to threaten the lives of a suspect's family? Air Date : 6th-Dec-2004  Read More

Season 3 Episode 10 - The Suffering of Strangers

It's Fiona's birthday, and she's not going to forget it! While inspecting a possible Islamic terrorist safe house, they are kidnapped. With the threat of his son's, his wife's and Danny's life, Adam must choose who won't live to see another day, Fiona or Danny? The prime minister's life is in danger. Will MI5 give into the kidnappers demands? But then to everybody's surprise... Danny makes the ultimate sacrifice. Air Date : 13th-Dec-2004  Read More