Bakley's four children are suing the "Baretta" star for the wrongful death of their mother, even though he was acquitted of her murder by a Van Nuys, Calif., jury earlier this year.
Blake admitted on the stand Thursday he gave police several versions of what happened the night of May 4, 2001, the Los Angeles Times reported Friday.
"I'm a human being; I'm not a machine. I'm 72. I'm dyslexic," Blake said.
Blake's testimony could last a week, the newspaper said.
Bakley, 44, was shot outside a Studio City, Calif., restaurant after dining with her husband. Blake told police he gone back into the restaurant because he forgot his gun and when he returned to the car, his wife was dead.
The attorney representing Bakley's children turned down a pre-trial settlement offer of $250,000, the Times said.