Sex Education.The actor, who plays Ola Nyman in the Netflix series, announced her departure during an interview on Capital Xtra radio show Breakfast With Yinka and Shayna Marie.Asked for a teaser of what to expect in season four, Allison replied: “I have absolutely loved being on Sex Education so much and playing Ola, but unfortunately I won’t be joining the team for season four.“I’m so sorry to have to break that to you guys, but I’m just going to be doing some other little things. Some other opportunities have come up.