The jury at the High Court in Glasgow heard the police interview of Neil McKenzie, 42, who admits some involvement in parcel bombs sent last March by giving instructions on how to put a hoax bomb together.
Asked in a tape-recorded interview how he learned to construct a hoax bomb, he claimed it was by watching the A-Team television programme.
He also claimed, after hearing an excerpt of audio surveillance of a conversation between him and co-accused Trevor Muirhead, 43, that he wanted peroxide to dye his hair, before admitting seeing a video online about using it to make a "flash".
Muirhead and McKenzie are on trial charged with planning to "assault and murder" the Celtic manager, the late QC Paul McBride and ex-MSP Trish Godman between March 1 and April 15 last year.
The court heard McKenzie was asked by DC Andy McCarthy if he was "involved" in the parcel bombs.
He answered: "Aye and no."
When asked: "What do you mean by 'aye'?" he replied: "Okay then. Aye, I'm involved."
McKenzie is heard saying he knew about the parcel being sent to Mr Lennon.
He was asked: "How did you know about that?" He replied: "I just did, heard folk talking about it."
Later in his interview McKenzie said he did not send or make the bombs but "told folk how to make them".
He also said "the first one was just a hoax". When asked to explain how to make the hoax bomb, McKenzie said the ingredients needed were putty, a bit of wire and a watch, and "any kind of watch" was okay.
The father-of-three denied making or sending the package and said he "did not want to say" if it was Mr Muirhead.
DC McCarthy asked Mr McKenzie: "How do you know how to construct a hoax parcel bomb?" He replied: "It's not rocket science, is it."
The jury heard him saying he learned it from the A-Team.
DC McCarthy asked him: "When was it that you saw the A-Team construct a hoax parcel bomb?" McKenzie replied: "A long time ago."
In the interview DC McCarthy said: "Do you appreciate how ridiculous that sounds?" He replied: "Aye, I do."
The court heard McKenzie bought three rubber watches, days before the parcels were sent last March, while shopping with his mother.
DC McCarthy asked: "Where are they?" McKenzie replied: "In the bin."
McKenzie was also questioned about why the following month he bought a suitcase, jiffy bags, travel bottles and nails.
He said the suitcase and travel bottles were in case his mother needed them for going on holiday and the nails were to fix his hut, which is no longer there.
The jury later heard McKenzie admitted being involved in the package intended for Mr Lennon at Celtic Park.
He said: "We were going to write on the back of it ... 'Return to Ally McCoist' kind of thing. It was meant to be a joke."
McKenzie said he bought the envelope and watch involved, that the putty was his and he had found the piece of wire.
He also got the postcode for Celtic Park on the internet, but denied he had sent the parcel.
The accused face an allegation they sent another suspected bomb to the offices of Cairde na hÉireann (Friends of Ireland) in the Gallowgate, Glasgow, and other allegations relating to the Explosive Substances Act.
They are also accused of threatening to plant an improvised explosive device outside a police station, and attempting to defeat the ends of justice by disposing of cream peroxide and wiring. They deny all charges.
The trial continues.