. "Cell guard"@en . "Cell guard"@en . "Human"@en . "Because the BBC reused the credit roll from episode one on episode two, actor Timothy Craven was not credited for this role. This error was not corrected in any home video release, not even in the 2009 DVD. Oddly, however, the info text on the DVD makes reference to the error."@en . . "Because the BBC reused the credit roll from episode one on episode two, actor Timothy Craven was not credited for this role. This error was not corrected in any home video release, not even in the 2009 DVD. Oddly, however, the info text on the DVD makes reference to the error."@en . . . . "Frontier in Space"@en . "Timothy Craven"@en . .