ORLANDO - FEBRUARY 24: The sign at the entrance to SeaWorld February 24, 2010 in Orlando, Florida. A female trainer who presumably slipped and fell in to a holding tank was fatally injured after she was attacked by an orca. This is the third human death associated with the killer whale, according to the Humane Society of the United States.
SeaWorld officials say Tilikum will participate in the park's "Believe" show beginning Wednesday morning.
Tilikum drowned 40-year-old Dawn Brancheau on Feb. 24, 2010, and has not participated in a show since then. Park officials are spending millions making safety upgrades.
The park is still working on plans to get trainers back in the water with the whales. The federal Occupational Safety and Health Administration last summer accused SeaWorld of recklessly putting trainers in danger. The company is fighting OSHA's citations and $75,000 fine.
SeaWorld Animal Training Curator Kelly Flaherty Clark says they feel it's an important part of Tilikum's physical, social and mental enrichment to perform again.