He also appeared at the beginning of a 2010 April Fool 's episode , along with Jeff Probst and Neil Patrick Harris .
In return , Sajak hosted a regular episode of Jeopardy ! in place of Trebek .
Sajak also appeared at the beginning of a 2010 April Fool 's episode , along with Jeff Probst and Neil Patrick Harris .
In return , Sajak hosted a regular episode of Jeopardy ! in place of Trebek .