Will Luke Return?

As many of you may already know, the character of Luke Smith departs in the first story of series 4 of SJA, leaving a series with just Sarah Jane, Rani and Clyde. it has been revealed that there will be a "companion of the week" for the next two series, similar to when Professor Rivers filled in for Luke in "The Eternity Trap", though reports are now coming in claiming that the character may return for various episodes of the two scheduled series.

It has also been speculated, though how true it is we are unsure, that they are hoping to bring the character back full time, should the show carry on past it's 5th series