The Welsh actor Philip Madoc has died aged 77, his agent said.
Madoc, who played the title role in the BBC drama The Life and Times of David Lloyd George, also appeared in shows including Doctor Who and The Last of the Mohicans.
His agent, Michael Hallet, said: "He passed away in hospital in Hertfordshire this morning after a short illness with his family around him. He will be hugely missed by everybody."
Madoc played a captured U-boat captain in an episode of Dad's Army in which he asked the names of his captors, prompting a furious Captain Mainwaring to shout the famous line: "Don't tell him, Pike."
The Merthyr Tydfil-born actor gained a reputation for playing villains, but insisted he did not mind. He said in one interview: "Certainly,