Convicted drug dealer Glenn Agliotti will take the witness stand for a fourth day on Thursday in the graft trial of former top cop Jackie Selebi.

Agliotti has been testifying against Selebi in the High Court in Johannesburg, revealing an intricate web of connections between himself, slain mining magnate Brett Kebble, ex-Hyundai boss Billy Rautenbach who recently made a deal with authorities on 326 tax evasion charges, top security officers and Selebi.

On Wednesday, even TV celebrity "Bad" Brad Wood got a mention during testimony, after the court heard he allegedly blackmailed Jordanian billionaire Eyhab Jumean over a sex tape.

State prosecutor Gerrie Nel has been questioning Agliotti, whose lawyer, Jaap Cilliers, objected more than once on Wednesday, but was overruled every time by Judge Meyer Joffe.

Selebi is facing two counts of corruption and defeating the ends of justice.

The charges relate to payments he allegedly received from Agliotti, Kebble, and ex-Hyundai boss and mining businessman Billy Rautenbach.

The State, in papers before the court, alleged that "Agliotti and/or Kebble and or Rautenbach and/or the relevant corporate entities have benefited the accused in the period 1 January 2000 up to and including 31 December 2005... in an amount of at least but not restricted to R1.2-million."

Agliotti received indemnity from prosecution if he testified against Selebi and answered "frankly and honestly", according to a deal with the State.

He is still facing a murder charge for Kebble's death in 2005.

Read more from the Selebi trial...