Celebrity Big Brother bosses are set to beef up their security after second break in last week.
For a second week in a row, pranksters broke into the studio in Elstree & Borehamwood.
The Daily Star newspaper reports that security has been "beefed up" ahead of the final, airing this Friday night.
Security specialist Will Geddes told the tabloid: “After the first incident they should have had a massive overhaul.
“For it to happen a second time is quite astounding, especially during a live show."
The second break in occurred during last Friday's live episode, as host Emma Willis announced the results of the latest eviction.
In delivering the results, the housemates became startled after some mystery guests appeared in the garden.
"Oh my God, I'm scared," Jess Impiazzi reacted.
Wayne Sleep shouted: "Big Brother, there are people in the house. They're outside the house."
"We have to say, people watching may have seen somebody get into the garden, Wayne mentioned it," host Emma said on the show. "Just so you know, everybody's fine. They didn't get into the house."
A spokesperson for Big Brother said in a statement on Saturday: "Two intruders attempted to enter the Big Brother house on Friday night. They were apprehended by security in the garden. Police were in attendance and removed them from site.
"Big Brother has reassured the housemates and all is calm in the house."
Intruders previously broke in a week earlier, but didn't make it directly inside the house after being caught in the camera runs.
A spokesperson for Big Brother said that time: "[On Friday] night, two intruders were apprehended by security at Elstree Studios.
"The safety of housemates, production and audience members is of paramount importance and Big Brother has appropriate security measures in place at all times."
Celebrity Big Brother 2018 continues nightly on Channel 5.
The final airs on Friday, February 2.